Perhaps you should try some spelling variations:
hoc chieu » hoc thieu, ho chieu, hoc dieu
hang hang » cang thang, hung thang, lang thang
nang hang » nang sang, cang thang, lang thang
tan thanh » tran thanh, tang thanh, toan thanh
ban cong » bang cong, van cong, phan cong
cong tan » cong tac, cong san, cong thanh
va ban » van ban, va bai, va bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (hoc hien)) sach - ((hang hang) OR (nang hang)) va ban cong tan thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc hien)) sach - ((hang hang) OR (nang hang)) va ban cong tan thanh san.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (hoc hien)) sach - ((hang hang) OR (nang hang)) va ban cong tan thanh san".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) sach - ((hang hang) OR (nang hang)) va ban cong tan thanh san*.