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
tuan duong » tuyen duong, tuong duong
van duong » van dong, van dung, van phong
cong tac » cong ty
tac nang » tac vang, tai nang, tap 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 sach - thanh trung ((tuan duong) or (van duong)) cong tac nang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung ((tuan duong) OR (van duong)) cong tac nang cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung ((tuan duong) or (van duong)) cong tac nang cao*.