Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trung cap » truong cao, trung tam
tranh cua » doanh cua, manh cua
30 trieu » 25 trieu
cong van » cong vang, cong san, song van
toan cao » toan ban, toan tap
tan cao » tao cao, tay cao, tan ca

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: 30 trieu tinh - hanh ((trung cap) OR (tranh cua)) nhung cong van ((tan cao) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "30 trieu tinh - hanh ((trung cap) or (tranh cua)) nhung cong van ((tan cao) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - hanh ((trung cap) or (tranh cua)) nhung cong van ((tan cao) OR (toan cao))*.