Perhaps you should try some spelling variations:
thanh tung » thanh cong
lieu tinh » trieu tinh, diep tinh, bien tinh
doc lieu » duoc lieu, doc hieu, du lieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
phan lap » phan dau
tung va » trung va, tuong va, dung va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc lieu tinh - thanh tung va nhung ((cong dan) OR (cong san)) ((than cap) OR (phan lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc lieu tinh - thanh tung va nhung ((cong dan) OR (cong san)) ((than cap) or (phan lap))~".
• Adding a wildcard symbol may retrieve word variants: doc lieu tinh - thanh tung va nhung ((cong dan) OR (cong san)) ((than cap) or (phan lap))*.