Perhaps you should try some spelling variations:
"hien luoc minh doanh luan van" » "hien luoc kinh doanh luan van", "hien luoc minh danh luan van", "hien luoc minh doan luan van", "chien luoc minh doanh luan van", "chien cuoc minh doanh luan van", "hien luong minh doanh luan van", "hien luoc dinh doanh luan van"
"hien luoc minh doanh nhan van" » "hien luoc kinh doanh nhan van", "hien luoc minh danh nhan van", "hien luoc minh doan nhan van", "chien luoc minh doanh nhan van", "chien cuoc minh doanh nhan van", "hien luong minh doanh nhan van", "hien luoc dinh doanh nhan van", "hien luoc minh doanh nhan dan", "hien luoc minh doanh nhan va", "hien luoc minh doanh phan van"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("hien luoc minh doanh luan van") OR ("hien luoc minh doanh nhan van"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"hien luoc minh doanh luan van\") OR (\"hien luoc minh doanh nhan van\"))".
• Removing quotes may allow a broader search: (( hien luoc minh doanh luan van ) OR ( hien luoc minh doanh nhan van )).
• Adding a wildcard symbol may retrieve word variants: (("hien luoc minh doanh luan van") OR ("hien luoc minh doanh nhan van"))*.