Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
van cong » van dong, van phong, phan cong
cong san » cong tac
san toan » van toan, dan toan, manh 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: doi ((chau tinh) or (trieu tinh)) - hanh tang luan van cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chau tinh) OR (trieu tinh)) - hanh tang luan van cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: doi ((chau tinh) or (trieu tinh)) - hanh tang luan van cong san toan cao*.