1 (wiktionary) 2 (vi.wikipedia) 3 (en.wikipedia) 4 (glosbe)

Core Words Familarize yourself with the 'core words'.
Compounds Expand your vocabulary by studying more complex words built by the 'core words'.
Wordsense Learn about the wordsenses of the english term.

ETYMOLOGY

KOREAN 3.0 Eng Wordtype Etym. Gb Vie
☆☆☆ INVESTIGATE; EXAMINE; LOOK INTO Verb 打听，了解，查询 tìm hiểu
☆☆ INQUIRY Noun 问议咨询 việc hỏi, việc tìm hiểu
☆☆ FIND OUT Verb 打探，探知 tìm hiểu, tìm tòi
☆ SEARCH; HUNT; LOCATION Noun 探索探索，搜索 sự tìm hiểu, sự tìm kiếm