Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
nang luan » hang luan, nang quan, bang luan
tang luan » dung luan
hang cong » dang cong, hang nong, bang cong
cong tan » cong tac, cong san, cong thanh
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 (hoc thieu)) sach - anh ((nang luan) OR (tang luan)) hang cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) sach - anh ((nang luan) OR (tang luan)) hang cong tan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (hoc thieu)) sach - anh ((nang luan) OR (tang luan)) hang cong tan van ban".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) sach - anh ((nang luan) OR (tang luan)) hang cong tan van ban*.