Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
canh ban » can ban, canh dan, doanh ban
canh van » anh van, can van, cach van
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 xanh - ((canh ban) or (canh van)) quan dung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh ban) OR (canh van)) quan dung cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh ban) or (canh van)) quan dung cong dan than cau*.