Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu xanh » chieu sach, chieu sang, chieu tinh
doanh cua » doanh luan
toan phan » thanh phan, toan ban, hoa phan
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » ban cua
dan phan » doan phan, dan chan, van phan

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: ho chieu xanh - canh ((manh cua) OR (doanh cua)) nhung cong ((dan phan) OR (toan phan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - canh ((manh cua) OR (doanh cua)) nhung cong ((dan phan) or (toan phan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - canh ((manh cua) OR (doanh cua)) nhung cong ((dan phan) or (toan phan)) cau*.