Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
trong van » trong cac
tang vat » tang van, dang vat, bang vat
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: theo tieu xanh - hanh ((tang vat) or (trong van)) nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh ((tang vat) OR (trong van)) nhung cong san toan cao*.