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Happy Class – Happy teachers + happy students — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Language Learning →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
helixnanotechnologies.org ↗	61 match 2 shared topics	Home - Study English with Us	vi	language-learning WordPress WooCommerce	robotsllmsaihumans	emailphone	none
donxuan.org ↗	61 match 2 shared topics	Home - Study English with Us	vi	language-learning WordPress WooCommerce	robotsllmsaihumans	emailphone	none
2badu.net ↗	61 match 2 shared topics	Home - Study English with Us	vi	language-learning WordPress WooCommerce	robotsllmsaihumans	emailphone	none
badakorean.com ↗	60 match 2 shared topics	Bada Korean - Học tiếng Hàn online hiệu quả	vi	language-learning WordPress	robotsllmsaihumans	email phone	none
ieltscinematic.com ↗	60 match 2 shared topics	Học IELTS nhẹ nhàng	vi	language-learning WordPress	robotsllmsaihumans	emailphone	none
9academy.net ↗	32 match 1 shared topics	9Academy – Học viện 9Academy	vi	online-education WordPress WooCommerce	robotsllmsaihumans	emailphone	partial · 8
translatemobi.com ↗	32 match 1 shared topics	taw·lms — Studio AI-Native Building cho người đi làm	vi	online-education	robotsllmsaihumans	emailphone	none
earlysigns.net ↗	31 match 1 shared topics	Kiểm tra phát âm tiếng Anh – Luyện tập với phản hồi IPA	vi	language-learning	robotsllmsaihumans	emailphone	none
1phuttiengphapcungtree.com ↗	31 match 1 shared topics	1 phút tiếng Pháp cùng Tree – 1 minute? Ça marche!	vi	language-learning WordPress WooCommerce	robotsllmsaihumans	emailphone	none
helpenglishvn.com ↗	30 match 1 shared topics	Trường Anh ngữ HELP Philippines	vi	language-learning	robotsllmsaihumans	emailphone	none
hethonganhnguamt.com ↗	30 match 1 shared topics	Trang chủ - HỆ THỐNG ANH NGỮ AMT	vi	language-learning WordPress	robotsllmsaihumans	email phone	none
heywordvocab.com ↗	30 match 1 shared topics	HeyWord — Học Từ Vựng Tiếng Anh TOEIC, IELTS & Giao Tiếp Bằng AI	vi	language-learning	robotsllmsaihumans	emailphone	none
deutschtiger.com ↗	30 match 1 shared topics	Deutsch Tiger - Học tiếng Đức miễn phí \| Luyện thi B1 Goethe & TELC	vi	language-learning	robots llmsaihumans	emailphone	partial · 8
dongtrunghathao.com ↗	30 match 1 shared topics	XEM LẠI BÀI HỌC INAFESA	vi	online-education	robotsllmsaihumans	emailphone	none
easynhatrang.com ↗	30 match 1 shared topics	TRUNG TÂM NGOẠI NGỮ EASY Nha Trang	vi	language-learning	robotsllmsaihumans	emailphone	none
enrichenglish.app ↗	30 match 1 shared topics	Enrich English - Luyện tiếng Anh với AI	vi	language-learning	robotsllmsaihumans	emailphone	partial · 8
123goup.com ↗	30 match 1 shared topics	Trang chủ - 123 GOUP	vi	language-learning WordPress WooCommerce	robotsllmsaihumans	email phone	none
123hoctienganh.net ↗	30 match 1 shared topics	Lớp tiếng Anh giao tiếp cho mọi người ở Quận 7	vi	language-learning	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.