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
quang dong » quang dung, quang cuong, quang hoang
tran thanh » ban thanh, van thanh, quan thanh
quan dong » quan long, quan hoang, quan trong
cong san » cong tac
tran tan » tran tuan, tran van, trang tuan

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 ((quan dong) or (quang dong)) cong san ((tran tan) OR (tran thanh))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung ((quan dong) OR (quang dong)) cong san ((tran tan) OR (tran thanh)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh trung ((quan dong) or (quang dong)) cong san ((tran tan) OR (tran thanh))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung ((quan dong) or (quang dong)) cong san ((tran tan) OR (tran thanh))*.