Perhaps you should try some spelling variations:
van nhuong » van chuong, van phuong, van huong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tran » hanh trang, thanh tran, hanh tram
tran van » luan van
cong dan » cong san, cong tan, cong dong
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh tran van nhuong ((cong dan) or (huong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh tran van nhuong ((cong dan) OR (huong dan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tran van nhuong ((cong dan) or (huong dan)) toan cao*.