Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
va dung » van dung, va duong, vat dung

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 - ((thanh tung) or (thanh cong)) va dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((thanh tung) OR (thanh cong)) va dung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((thanh tung) or (thanh cong)) va dung cong dan toan cao*.