Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tran » thanh trang, thanh toan, thanh tra
hoc thieu » toc thieu, hoc hien
bang cong » dang cong, bang song, hang cong
tran van » luan van
van bang » van ban, van nang, von bang
tac toan » tap toan, tam toan, hach toan
tam than » ban than

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 tran van bang cong ((tac toan) or (tam than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tran van bang cong ((tac toan) OR (tam than)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tran van bang cong ((tac toan) or (tam than)) cao*.