Perhaps you should try some spelling variations:
phung cong » nhung cong, phong cong, nhung chong
doi chieu » doc hieu, ho chieu, mot chieu
canh tran » canh tranh, hanh trang, banh trang
van phung » van phong, van hung, van chuong
tran van » luan van
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doi chi)) xanh - canh tran van phung cong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - canh tran van phung cong dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doi chi)) xanh - canh tran van phung cong dan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doi chi)) xanh - canh tran van phung cong dan ((toan cau) or (toan cao))*.