Perhaps you should try some spelling variations:
khai sang » kha nang, nha sang, thai bang
tong cong » trong cong, cong cong, dung cong
san thanh » ban thanh, van thanh, son thanh
thanh cau » thanh chau, thanh mau, nhanh cau
doi khai » doi khi, toi khai, doi khang
cong tac » cong ty
tac tong » tac trong, tac thong, tac dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khai sang - thanh cong tac tong cong san thanh cau~.
• Adding a wildcard symbol may retrieve word variants: doi khai sang - thanh cong tac tong cong san thanh cau*.