Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trung va » truong va, trang va, trung ha
cong tan » cong tac, cong san, cong thanh
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac
ho lieu » so lieu, co lieu, ho kieu

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: ho lieu tinh - manh ((trung va) OR (trung tam)) nhung cong tan ((than cap) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - manh ((trung va) or (trung tam)) nhung cong tan ((than cap) OR (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - manh ((trung va) or (trung tam)) nhung cong tan ((than cap) OR (khan cap))*.