Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
hieu luat » hieu qua
dinh dung » dinh duong, dinh hung, tinh dung
van hieu » cao hieu
van hien » van tien
hien van » thien van, hieu van, dien van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( hanh trinh luan van hieu luat ) or ( dinh dung luan van hien van ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hanh trinh luan van hieu luat ) OR ( dinh dung luan van hien van ))*.