Perhaps you should try some spelling variations:
tieu trinh » tien trinh, tien thinh, trieu tinh
hanh dong » ha dong
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
manh toan » thanh toan, anh tuan, tinh toan
anh dong » anh huong, anh son
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: theo tieu trinh - ((hanh dong) or (anh dong)) luan hung cong ((dan toan) OR (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu trinh - ((hanh dong) OR (anh dong)) luan hung cong ((dan toan) OR (manh toan)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu trinh - ((hanh dong) or (anh dong)) luan hung cong ((dan toan) OR (manh toan)) ban*".