Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chi thanh » chi nhanh, thi thanh, cho thanh
cong manh » cong danh, duong manh, cong thanh
trung ha » trung hoc, trung cap
toan cao » toan tap
toan ban » van ban
hoc chi » hoc chia, hoc cho, hoc chu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chi thanh - thanh ((trung tam) or (trung ha)) nhung cong manh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chi thanh - thanh ((trung tam) OR (trung ha)) nhung cong manh ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chi thanh - thanh ((trung tam) or (trung ha)) nhung cong manh ((toan cao) or (toan ban))*.