Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh dung » thanh duong, thanh tung, thanh hung
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
dung vat » dung va, dong vat, dung dat
vat dung » van dung, va dung, viet dung
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van 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 dung vat dung cong ((dan toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh dung vat dung cong ((dan toan) OR (dan than)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh dung vat dung cong ((dan toan) or (dan than)) cao*.