Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
anh tang » anh bang, anh dang, anh sang
anh nang » ganh nang, anh bang, anh dang
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau

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 (hoc thieu)) sach - ((anh tang) or (anh nang)) luan han cong tac tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) sach - ((anh tang) OR (anh nang)) luan han cong tac tran cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) sach - ((anh tang) or (anh nang)) luan han cong tac tran cau*.