Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hien manh » hien hanh, tien manh, hieu manh
nang cong » nang song, dang cong, bang cong
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau
va nang » van nang, da nang, cam nang

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - canh trinh va nang cong tan ((phan cau) OR (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - canh trinh va nang cong tan ((phan cau) OR (phan dau))*.