Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh qua » tranh cua, thanh qua, trinh qua
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
doc hieu » toc thieu, hoc thieu, hoc hien
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh
hang dau » hang va, hang tai

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 qua dung cong tan ((thanh lap) or (hang dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh tranh qua dung cong tan ((thanh lap) OR (hang dau)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tranh qua dung cong tan ((thanh lap) or (hang dau))*.