Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
van phuong » van phong, va phuong, van chuong
canh tran » canh tranh, hanh trang, banh trang
thi hieu » thi chieu, thi hien, thi dieu
tran van » luan van
cong san » cong tac
ran cau » van cau, ban cau, tran chau
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (thi hieu)) xanh - canh tran van phuong cong san ((ran cau) or (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (thi hieu)) xanh - canh tran van phuong cong san ((ran cau) OR (can cau)).
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (thi hieu)) xanh - canh tran van phuong cong san ((ran cau) or (can cau))*.