Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hoc chinh » hoan chinh, hoc sinh, hoc kinh
hang cong » dang cong, hang nong, bang cong
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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