Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
anh dong » anh huong, anh son
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 - ((anh dong) or (sach dung)) cua nhung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - ((anh dong) OR (sach dung)) cua nhung cong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - ((anh dong) or (sach dung)) cua nhung cong tac toan ban*.