Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tam duong » tam huong, tuan duong, thao duong
trong bai » thong bai, trong hai, trong tai
trong ban » trong san, trong tan, trong quan
tam dung » tac dung, tan dung, am dung
toan tap » toan ban

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 sach - thanh trung ((tam dung) or (tam duong)) ((trong bai) OR (trong ban)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung ((tam dung) OR (tam duong)) ((trong bai) OR (trong ban)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh trung ((tam dung) or (tam duong)) ((trong bai) OR (trong ban)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung ((tam dung) or (tam duong)) ((trong bai) OR (trong ban)) toan tap*.