Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
van thanh » ban thanh, van tuan
cao hang » cao dang, cao tang, cao nang
cao bang » cao dang, cao tang, cao nang
ban than » ban thanh, ban hang, ban hanh

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

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