Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
trung cao » truong cao, trung co, trung ca
trung cap » truong cao, trung tam
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
toan ban » van ban

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: theo chu xanh - thanh ((trung cao) OR (trung cap)) ((nhung cong) OR (thong cong)) tinh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - thanh ((trung cao) OR (trung cap)) ((nhung cong) or (thong cong)) tinh toan ban~".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - thanh ((trung cao) OR (trung cap)) ((nhung cong) or (thong cong)) tinh toan ban*.