Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
phan cong » thanh cong
phan cung » phan ung, phan xuong, phan quang
luan cong » luat cong, luong cong, luan chung
cong cong » cong dong, trong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
van toan » van tuan, van tan, van thanh

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 - ((phan cong) or (phan cung)) luan cong cong ((van toan) or (van ban)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((phan cong) OR (phan cung)) luan cong cong ((van toan) OR (van ban)) cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((phan cong) or (phan cung)) luan cong cong ((van toan) or (van ban)) cau*.