Perhaps you should try some spelling variations:
"tieu trinh luan van kinh doanh" » "tien trinh luan van kinh doanh", "tien thinh luan van kinh doanh", "trieu tinh luan van kinh doanh", "tieu trinh luat van kinh doanh", "tieu trinh quan van kinh doanh", "tieu trinh han van kinh doanh", "tieu trinh luan va kinh doanh", "tieu trinh luan van dinh doanh", "tieu trinh luan van binh doanh"
"dieu thi luan van minh doanh" » "dieu thi luan van minh danh", "dieu thi luan van minh doan", "dieu thi luan van chinh doanh", "dieu tri luan van minh doanh", "sieu thi luan van minh doanh", "dien thi luan van minh doanh", "dieu thi lan van minh doanh", "dieu thi xuan van minh doanh", "dieu thi loan van minh 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: (("tieu trinh luan van kinh doanh") or ("dieu thi luan van minh doanh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("tieu trinh luan van kinh doanh") OR ("dieu thi luan van minh doanh")).
• Removing quotes may allow a broader search: (( tieu trinh luan van kinh doanh ) or ( dieu thi luan van minh doanh )).
• Adding a wildcard symbol may retrieve word variants: (("tieu trinh luan van kinh doanh") or ("dieu thi luan van minh doanh"))*.