Perhaps you should try some spelling variations:
trung thanh » truong thanh
tien thanh » tien thinh, tran thanh, den thanh
truong cua » truong ca, truong quan, truong cao
hoc tien » hoc tieng, hoc hien, hoc vien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien thanh - hanh ((truong cua) or (trung thanh)) dung ((cong dan) OR (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien thanh - hanh ((truong cua) OR (trung thanh)) dung ((cong dan) OR (cong san)) toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tien thanh - hanh ((truong cua) or (trung thanh)) dung ((cong dan) OR (cong san)) toan cao*".