Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
chi xanh » chi anh, chi danh, chi hanh
tranh va » tranh van, trang va, trinh va
tan phan » toan phan, than phan, van phan
toan ban » van ban
doi chi » doi khi

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: doi chi xanh - canh tranh va ((nhung cong) OR (thong cong)) ((tan phan) OR (toan ban)) tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - canh tranh va ((nhung cong) OR (thong cong)) ((tan phan) or (toan ban)) tu~".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - canh tranh va ((nhung cong) OR (thong cong)) ((tan phan) or (toan ban)) tu*.