Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
lang duong » lang muong, lang tuong, tang duong
hanh tang » hanh trang, anh tang, hanh mang
lang dong » lang trong, lao dong, cong dong
ho chieu » hoc thieu, doi chieu, mot chieu
van than » van thanh, van thang, van tuan
than man » than ma, thanh san, tran manh
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo chieu)) sach - hanh tang va ((lang duong) OR (lang dong)) van than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - hanh tang va ((lang duong) OR (lang dong)) van than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) sach - hanh tang va ((lang duong) OR (lang dong)) van than man".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) sach - hanh tang va ((lang duong) OR (lang dong)) van than man*.