Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
canh trinh » hanh trinh, canh tinh, anh trinh
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
hoc tien » hoc tieng, hoc hien, hoc vien
dan toan » van toan, dan than, xuan toan
va dung » van dung, va duong, vat dung

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