Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thanh trung » thanh tung
cua phuong » cuu phuong, cuc phuong, luan phuong
dtinh toan » trinh toan, tinh than, hinh toan
bien tinh » bi tinh, yen tinh, diep tinh
trung cua » truong cua, trung tuan, trung cap
ho bien » pho bien, hoa bien, so bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho bien tinh - thanh trung cua phuong cong ((dtinh toan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho bien tinh - thanh trung cua phuong cong ((dtinh toan) OR (tinh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho bien tinh - thanh trung cua phuong cong ((dtinh toan) or (tinh toan)) cau*.