Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hoa chinh » hoan chinh, hoa hinh, hoc chinh
phan than » phan thanh, phan tan, khan than
dung cong » dung trong
than cua » nhan cua, thai cua, ban cua
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoa chinh sach - phan than cua ((nhung cong) or (dung cong)) dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoa chinh sach - phan than cua ((nhung cong) OR (dung cong)) dan than tap.
• Adding a wildcard symbol may retrieve word variants: hoa chinh sach - phan than cua ((nhung cong) or (dung cong)) dan than tap*.