Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
canh trinh » canh tranh, hanh trinh, canh tinh
chang cong » hang cong, chong cong, thanh cong
trinh han » trinh quan
han chang » san chang, phan chung, thon chang
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan cac » nhan cach, phan dau, phan lap

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 nhanh - canh trinh han chang cong tac phan cac~.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - canh trinh han chang cong tac phan cac*.