Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, theo chu, thi chieu
duong manh » duong van
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » hoc thieu, doi chieu, mot chieu
van nang » van quang, van ban, van dong
toan ban » van ban
va nang » da nang, cam nang, kha nang

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

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