Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
tran chau » tranh chap, tran huu
anh tang » anh bang, anh dang, anh nang
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
cong san » cong tac
san tran » tan tran, ban tran, dang tran

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