Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
dang cong » dung cong
lua dang » cua dang, lua sang, luan nang
cong tan » cong tac, cong san, cong thanh
thi lua » thi luan, thi dua, thi cua
tan phi » tac phi, tan phu, toan phai
phi phi » chi phi, phi thi, thi phi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu tinh)) - hoang thi lua dang cong tan phi phi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu tinh)) - hoang thi lua dang cong tan phi phi*.