Perhaps you should try some spelling variations:
"chien luoc kinh doanh luan van" » "chien luoc kinh doanh nhan van", "chien luoc dinh doanh luan van"
"chien luoc minh OR luong minh doanh luan van" » "chien luoc minh OR luong minh doanh nhan van", "chien luoc minh OR duong minh doanh luan van", "chien luoc minh OR luong manh doanh luan van", "chien luoc minh OR luong ninh doanh luan van", "chien luoc dinh OR luong minh doanh luan van", "chien duc minh OR luong minh doanh luan van", "chien ngoc minh OR luong minh doanh luan 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: (("chien luoc kinh doanh luan van") or ("chien ((luoc minh) OR (luong minh)) doanh luan van"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("chien luoc kinh doanh luan van") OR ("chien ((luoc minh) OR (luong minh)) doanh luan van")).
• Removing quotes may allow a broader search: (( chien luoc kinh doanh luan van ) or ( chien ((luoc minh) OR (luong minh)) doanh luan van )).
• Adding a wildcard symbol may retrieve word variants: (("chien luoc kinh doanh luan van") or ("chien ((luoc minh) OR (luong minh)) doanh luan van"))*.