Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hoang hao » hoang thao, hoang hai, hoan hao
dung cong » dung trong
lua dung » qua dung, luan hung, qua duong
cong tan » cong tac, cong san, cong thanh
tan khoa » toan khoa, tran khoa, san khoa
khoa tap » khoa tai, khoa than, hoc tap
hao lua » bao lua, khao luan, chat lua

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 hao lua dung cong tan khoa tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu tinh)) - hoang hao lua dung cong tan khoa tap.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu tinh)) - hoang hao lua dung cong tan khoa tap*.