Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh van » trinh han, trinh quan, trinh toan
van thong » van thuong, van phong, va thong
thong van » trong van, thong va, thong quan
theo yeu » thiet yeu, theo chu
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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: ((theo tieu) OR (theo yeu)) xanh - canh trinh van thong thong van ((than cau) OR (than cap))~.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (theo yeu)) xanh - canh trinh van thong thong van ((than cau) or (than cap))*.