Perhaps you should try some spelling variations:
tien manh » tien anh, tien thanh, tieng anh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan han » luan hoan, luan phan, luan van
tong tac » tuong tac, trong tac, cong tac
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tien manh) or (dieu hanh)) - hanh tang luan han tong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tien manh) OR (dieu hanh)) - hanh tang luan han tong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: theo ((tien manh) or (dieu hanh)) - hanh tang luan han tong tac toan cao*.