Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh hung » thanh huong, thanh tung, thanh trung
dung cong » dung trong
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan

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 truong) or (thanh hung)) qua dung cong tan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((thanh truong) OR (thanh hung)) qua dung cong tan phan tu.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((thanh truong) or (thanh hung)) qua dung cong tan phan tu*.