Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
thong cong » trong cong, tong cong, thong thong
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
ho chiet » ho chieu, hoc thiet, hoa thiet
ho thiet » hoc thiet, hoa thiet, so thiet
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chiet) OR (ho thiet)) tach - doanh doanh cua thong cong ((tinh toan) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho thiet)) tach - doanh doanh cua thong cong ((tinh toan) OR (van toan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (ho thiet)) tach - doanh doanh cua thong cong ((tinh toan) or (van toan)) cau*".