Perhaps you should try some spelling variations:
tieu trinh » tien trinh, tien thinh, trieu tinh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
manh toan » thanh toan, anh tuan, tinh toan
luan ung » luan hung, luon ung, luan chung
ung cong » dung cong, luong cong, duong cong
dan than » dan chan, ban than, van than

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 tang luan ung cong ((manh toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu trinh - hanh tang luan ung cong ((manh toan) OR (dan than)) cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu trinh - hanh tang luan ung cong ((manh toan) or (dan than)) cao*.