Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh van » trinh han, trinh quan, trinh toan
nang cong » nang song, dang cong, hang cong
bang cong » dang cong, bang song, hang cong
ho trieu » mot trieu, 25 trieu, 30 trieu
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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: ho trieu tinh - canh trinh van ((nang cong) OR (bang cong)) dan ((than cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho trieu tinh - canh trinh van ((nang cong) OR (bang cong)) dan ((than cau) or (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: ho trieu tinh - canh trinh van ((nang cong) OR (bang cong)) dan ((than cau) or (phan cau))*.