Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hoc chinh » hoan chinh, hoc sinh, hoc kinh
dung cong » dung trong
vang juan » van quan, van tuan, tang luan
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
juan cao » quang cao, toan cao, quan cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chinh sach - thanh ((trung va) OR (trung ha)) ((nhung cong) or (dung cong)) vang juan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chinh sach - thanh ((trung va) OR (trung ha)) ((nhung cong) OR (dung cong)) vang juan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chinh sach - thanh ((trung va) OR (trung ha)) ((nhung cong) or (dung cong)) vang juan cao".
• Adding a wildcard symbol may retrieve word variants: hoc chinh sach - thanh ((trung va) OR (trung ha)) ((nhung cong) or (dung cong)) vang juan cao*.