Perhaps you should try some spelling variations:
hoan chinh » hanh chinh, hoa hinh
thanh tung » thanh cong
khang cong » hang cong, thanh cong, dang cong
van khang » van khanh, van thanh, van quang
tung van » trung van, tang van, dung van
tac than » tac thanh, tam than, tac nhan
tao nhan » ca nhan, tue nhan, tri nhan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoan chinh sach - thanh tung van khang cong ((tac than) or (tao nhan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoan chinh sach - thanh tung van khang cong ((tac than) OR (tao nhan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoan chinh sach - thanh tung van khang cong ((tac than) or (tao nhan)) cau*.