Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tranh qua » tranh cua, thanh qua, trinh qua
dung cong » dung trong
chu sang » chu bang, thu sang, chieu sang
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh
tan khan » tan khang, tan nhan, toan khoan
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu sang) or (chieu sach)) - canh tranh qua dung cong tan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sang) OR (chieu sach)) - canh tranh qua dung cong tan khan cap.
• Adding a wildcard symbol may retrieve word variants: theo ((chu sang) or (chieu sach)) - canh tranh qua dung cong tan khan cap*.