Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh vat » trinh van, trinh luat, sinh vat
dang cong » dung cong
toc tran » boc tran, soc trang, toan tran
vat dang » van dang, vat dung, va dang
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc tran quang - canh trinh vat dang cong tac phan dau~.
• Adding a wildcard symbol may retrieve word variants: toc tran quang - canh trinh vat dang cong tac phan dau*.