Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh van » tran van, trinh van, thanh van
hang cong » dang cong, hang nong, bang cong
doc hieu » toc thieu, hoc thieu, hoc hien
van hang » van khang, van hoang, van thang
cong san » cong tac
toan cau » toan cao, toan tai
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: doc hieu xanh - canh tranh van hang cong san ((((toan cau) or (toan tap))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh tranh van hang cong san ((((toan cau) OR (toan tap))) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tranh van hang cong san ((((toan cau) or (toan tap))) or (toan ban))*.