Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
canh trang » canh tranh, hanh trang, banh trang
dong trong » duong trong, dung trong, cong trong
hoc thieu » toc thieu, hoc hien
trang van » tran van, trang va, trong van
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - canh trang van dong trong ((dan than) or (ban than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - canh trang van dong trong ((dan than) OR (ban than)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh trang van dong trong ((dan than) or (ban than)) ban*.