Perhaps you should try some spelling variations:
hieu luat » hieu qua
bien soan » bien so
van hieu » cao hieu
tin nang » tin dung, thi nang, van nang
ki nang » ky nang
quan vi » quan li, quan tri, quan doi
vi bien » voi bien, vi mien, va bien
luan » lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh dung luan van hieu luat ) or ( ((tin nang) or (ki nang)) quan vi bien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dung luan van hieu luat ) OR ( ((tin nang) OR (ki nang)) quan vi bien soan )).
• Adding a wildcard symbol may retrieve word variants: (( trinh dung luan van hieu luat ) or ( ((tin nang) or (ki nang)) quan vi bien soan ))*.