Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
chiet tach » chieu sach
truong cao » truong dai
quang cao » nang cao, quang nam
han cong » phan cong, hang cong, hanh cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (thien thanh)) - thanh ((quang cao) or (truong cao)) han cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (thien thanh)) - thanh ((quang cao) OR (truong cao)) han cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (thien thanh)) - thanh ((quang cao) or (truong cao)) han cong dan toan ban*.