Perhaps you should try some spelling variations:
theo chua » theo chu, ho chua, cheo cua
chua xang » chua nang, chuc nang, chu bang
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
cong can » cong tan, cong dan, cong cau
cong san » cong tac
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chua xang - hanh tang luan van ((cong can) or (cong san)) ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chua xang - hanh tang luan van ((cong can) OR (cong san)) ban cau.
• Adding a wildcard symbol may retrieve word variants: theo chua xang - hanh tang luan van ((cong can) or (cong san)) ban cau*.