Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trung hoc » trung quoc
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung ha
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo tieu)) xanh - thanh ((trung va) or (trung hoc)) nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo tieu)) xanh - thanh ((trung va) OR (trung hoc)) nhung cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo tieu)) xanh - thanh ((trung va) or (trung hoc)) nhung cong san toan cao*.