Perhaps you should try some spelling variations:
"trieu thi luan van minh doanh" » "trieu thi luan van kinh doanh", "trieu thi luan van minh danh", "trieu thi luan van chinh doanh", "trieu thi luan van minh toanh", "trieu thi luan van minh donh", "trieu thi luan van kinh doanhh", "trieu thi lan van minh doanh", "trieu thi xuan van minh doanh", "trieu thi loan van minh doanh", "thieu thi luan van minh doanh", "trien thi luan van minh doanh", "tieu thi luan van minh doanh"
"sieu thi luan van minh doan" » "sieu thi luan van minh toan", "sieu thi luan van minh don", "sieu thi luan van kinh doanh", "sieu thi lan van minh doan", "sieu thi xuan van minh doan", "sieu thi loan van minh doan", "dieu tri luan van minh doan", "su thi luan van minh doan", "tiep thi luan van minh doan"

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