Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
truong cua » truong ca, truong quan, truong cao
hieu lang » chieu sang, hieu quang, nhieu tang
dung cua » dung luan, dung cho
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((dung cua) or (truong cua)) nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((dung cua) OR (truong cua)) nhung cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((dung cua) or (truong cua)) nhung cong san toan cao*.