Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh cua » doanh cua
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
manh cua » doanh cua, ban cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - canh ((tranh cua) or (manh cua)) dang cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh ((tranh cua) OR (manh cua)) dang cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh ((tranh cua) or (manh cua)) dang cong tac toan tap*.