Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hanh dong » anh dong, ha dong
dong luan » dung luan, tong luan, dong xuan
luan tinh » quan tinh, luan kinh, luan sinh
tinh cong » trinh cong, tinh cuong, minh cong
cong tan » cong tac, cong san, cong thanh
van chat » cao chat
tan van » tran van, tang van, luan van

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) or (toc thieu)) sach - hanh dong luan tinh cong tan van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - hanh dong luan tinh cong tan van chat*.