Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chi xanh » chi anh, chi danh, chi hanh
tranh va » tranh van, trang va, trinh va
cong san » cong tac
toan cau » toan ban, toan tai
toan tap » toan ban
toan cao » toan 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 san ((((toan cau) OR (toan tap))) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - canh tranh va nhung cong san ((((toan cau) OR (toan tap))) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - canh tranh va nhung cong san ((((toan cau) OR (toan tap))) or (toan cao))*.