Perhaps you should try some spelling variations:
"dien tri tuan van minh doanh" » "dien tri tuan van kinh doanh", "dien tri tuan van minh danh", "dien tri tuan van chinh doanh", "dien tri tuan van minh toanh", "dien tri tuan van minh donh", "dien tri tuan van kinh doanhh", "dien trai tuan van minh doanh", "dieu tri tuan van minh doanh", "dien thi tuan van minh doanh", "dien tri quan van minh doanh", "dien tran tuan van minh doanh", "dien tri tue van minh doanh", "dien tri tran van minh doanh", "dien tri tan van minh doanh"
"trieu thi luan van minh doan" » "trieu thi luan van minh toan", "trieu thi luan van minh don", "trieu thi luan van kinh doanh", "trieu thi lan van minh doan", "trieu thi xuan van minh doan", "trieu thi loan 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: (("dien tri tuan van minh doanh") or ("trieu thi luan van minh doan"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("dien tri tuan van minh doanh") OR ("trieu thi luan van minh doan")).
• Removing quotes may allow a broader search: (( dien tri tuan van minh doanh ) or ( trieu thi luan van minh doan )).
• Adding a wildcard symbol may retrieve word variants: (("dien tri tuan van minh doanh") or ("trieu thi luan van minh doan"))*.