Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
canh tran » canh tranh, hanh trang, banh trang
nhung don » nhung van, nhung bo
hang cong » dang cong, hang nong, bang cong
tran van » luan van
ban ban » ban banh, can ban, ban dan

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 tran van ((nhung don) or (hang cong)) van ban ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - canh tran van ((nhung don) OR (hang cong)) van ban ban*.