Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc trieu » hoc thieu, hoc tieu, hoc dieu
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc trieu tinh - hanh ((trung va) OR (trung ha)) nhung cong dan than cau~.
• Adding a wildcard symbol may retrieve word variants: hoc trieu tinh - hanh ((trung va) or (trung ha)) nhung cong dan than cau*.