Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trong tac » trong cac, tuong tac, trong tan
luong tai » dung tai, luong va
dung cong » dung trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - thanh ((trong tac) or (luong tai)) dung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - thanh ((trong tac) OR (luong tai)) dung cong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - thanh ((trong tac) or (luong tai)) dung cong tac toan ban*.