Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh
thong cong » trong cong, tong cong, thong thong
den thanh » de thanh, dinh thanh, dong thanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien thanh) OR (den thanh)) - canh tranh cua thong cong ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien thanh) OR (den thanh)) - canh tranh cua thong cong ((dan toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien thanh) OR (den thanh)) - canh tranh cua thong cong ((dan toan) or (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien thanh) OR (den thanh)) - canh tranh cua thong cong ((dan toan) or (manh toan)) cau*.