Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
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 tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, tra cau
doi chi » doi khi
ran cau » van cau, ban cau, can 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 chi) or (hoc thieu)) sach - anh tang luan han cong tan ((tran cau) OR (ran cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chi) OR (hoc thieu)) sach - anh tang luan han cong tan ((tran cau) OR (ran cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chi) or (hoc thieu)) sach - anh tang luan han cong tan ((tran cau) OR (ran cau))".
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (hoc thieu)) sach - anh tang luan han cong tan ((tran cau) OR (ran cau))*.