Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
truong va » truong dai, truong cao, truong dao
doc hieu » toc thieu, hoc thieu, hoc hien
trung va » trang va, trung ha, trung tam
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
phan cac » nhan cach, phan dau, phan lap

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 hieu tinh - thanh ((trung va) OR (truong va)) nhung cong san ((than cap) OR (phan cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu tinh - thanh ((trung va) OR (truong va)) nhung cong san ((than cap) or (phan cac))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - thanh ((trung va) OR (truong va)) nhung cong san ((than cap) or (phan cac))*.