Perhaps you should try some spelling variations:
chiet tach » chieu sach
chieu sang » chieu sach, chieu xanh, hieu lang
tranh qua » tranh cua, thanh qua, trinh qua
dung cong » dung trong
qua dung » quang dung, su dung, qua song
cong san » cong tac
phan dau » 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: ho ((chiet tach) or (chieu sang)) - canh tranh qua dung cong san ((phan dau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (chieu sang)) - canh tranh qua dung cong san ((phan dau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: ho ((chiet tach) or (chieu sang)) - canh tranh qua dung cong san ((phan dau) or (phan tu))*.