Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
dang cong » dung cong
chi xanh » chi anh, chi danh, chi hanh
van tuan » van quan, van ban, anh tuan
doi chi » doi khi
van tan » van ban, van tai, van thanh

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 - hanh tranh cua ((nhung cong) OR (dang cong)) ((van tan) OR (van tuan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - hanh tranh cua ((nhung cong) or (dang cong)) ((van tan) OR (van tuan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh tranh cua ((nhung cong) or (dang cong)) ((van tan) OR (van tuan)) cau*.