Perhaps you should try some spelling variations:
"dieu trinh luan van kinh doanh" » "tieu trinh luan van kinh doanh", "dieu tri luan van kinh doanh", "diep tinh luan van kinh doanh", "dieu trinh luat van kinh doanh", "dieu trinh quan van kinh doanh", "dieu trinh han van kinh doanh", "dieu trinh luan va kinh doanh", "dieu trinh luan van minh doanh", "dieu trinh luan van dinh doanh"
"dieu thi luan van kinh doanh" » "dieu thi luan va kinh doanh", "dieu thi luan van minh doanh", "dieu thi luan van dinh doanh", "dieu tri luan van kinh doanh", "sieu thi luan van kinh doanh", "dien thi luan van kinh doanh", "dieu thi lan van kinh doanh", "dieu thi xuan van kinh doanh", "dieu thi loan van kinh doanh"

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: (("dieu trinh luan van kinh doanh") or ("dieu thi luan van kinh doanh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("dieu trinh luan van kinh doanh") OR ("dieu thi luan van kinh doanh")).
• Removing quotes may allow a broader search: (( dieu trinh luan van kinh doanh ) or ( dieu thi luan van kinh doanh )).
• Adding a wildcard symbol may retrieve word variants: (("dieu trinh luan van kinh doanh") or ("dieu thi luan van kinh doanh"))*.