Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
trung cap » truong cao, trung tam
trung ha » trung hoc, trung tam
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 thien thanh - thanh ((trung ha) or (trung cap)) nhung ((cong dan) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - thanh ((trung ha) OR (trung cap)) nhung ((cong dan) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - thanh ((trung ha) or (trung cap)) nhung ((cong dan) or (cong san)) toan cao*.