Perhaps you should try some spelling variations:
hoc thieu » hoc hien
hang hang » nang hang, cang thang, hung thang
hang tai » hang va, dung tai
ban cong » bang cong, van cong, phan cong
cong san » cong tac
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac
tai ban » tai san, tai ngan, tai benh

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sach - hang hang tai ban cong san ((than cap) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (toc thieu)) sach - hang hang tai ban cong san ((than cap) OR (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) sach - hang hang tai ban cong san ((than cap) OR (khan cap))*.