Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
nang luan » tang luan, hang luan, nang quan
luan hang » luan nang, luan han, luan hung
anh nang » ganh nang, anh bang, anh dang
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty

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 hang ((cong tan) OR (cong tac)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) sach - anh nang luan hang ((cong tan) OR (cong tac)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (hoc thieu)) sach - anh nang luan hang ((cong tan) OR (cong tac)) van ban".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) sach - anh nang luan hang ((cong tan) OR (cong tac)) van ban*.