Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tinh » thanh binh, nhanh tinh, than kinh
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan tap » toan ban
tinh va » tich va, trinh van, trinh vat
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) or (hieu lang)) - thanh tinh va dung cong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu lang)) - thanh tinh va dung cong manh toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu lang)) - thanh tinh va dung cong manh toan tap*.