Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
theo trieu » theo tieu, theo chieu, thep tieu
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan nang » luan van, van nang, luan san
cong dan » cong san, cong tan, huong dan
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 trieu tinh - hanh tang luan nang ((cong dan) or (cong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo trieu tinh - hanh tang luan nang ((cong dan) OR (cong thanh)) toan cao.
• Adding a wildcard symbol may retrieve word variants: theo trieu tinh - hanh tang luan nang ((cong dan) or (cong thanh)) toan cao*.