Perhaps you should try some spelling variations:
doc chieu » doc hieu, toc thieu, hoc thieu
doi chieu » doc hieu, doi chi, ho chieu
tranh qua » tranh cua, thanh qua, trinh qua
dung cong » dung trong
qua dung » quang dung, su dung, qua song
cong tac » cong ty
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc chieu) or (doi chieu)) tinh - canh tranh qua dung cong tac ((thanh san) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc chieu) OR (doi chieu)) tinh - canh tranh qua dung cong tac ((thanh san) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: ((doc chieu) or (doi chieu)) tinh - canh tranh qua dung cong tac ((thanh san) or (phan dau))*.