Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hang cong » dang cong, hang nong, bang cong
cong manh » cong danh, duong manh, cong thanh
toan cao » toan tap
toan ban » van ban
va hang » van hang, va nang, va lang

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) or (thanh thuong)) va hang cong manh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((thanh trung) OR (thanh thuong)) va hang cong manh ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((thanh trung) or (thanh thuong)) va hang cong manh ((toan cao) or (toan ban))*.