Perhaps you should try some spelling variations:
"trien thi luan van dinh doanh" » "trien thi luan van minh doanh", "trien thi luan van chinh doanh", "trien thi luan van doanh doanh", "tren thi luan van dinh doanh", "trien chi luan van dinh doanh", "trien khai luan van dinh doanh", "trien thi lan van dinh doanh", "trien thi xuan van dinh doanh", "trien thi thuan van dinh doanh", "trien thi luan van dich doanh", "trien thi luan va dinh doanh"
"trieu thi loan van kinh doanh" » "trieu thi lan van kinh doanh", "trieu thi hoan van kinh doanh", "trieu thi lien van kinh doanh", "trieu thi doan van kinh doanh", "trieu thi toan van kinh doanh", "trieu thi loan va kinh doanh", "trieu thi loan van minh doanh", "trieu thi loan van binh doanh", "thieu thi loan van kinh doanh", "tieu 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: (("trieu thi loan van kinh doanh") or ("trien thi luan van dinh doanh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("trieu thi loan van kinh doanh") OR ("trien thi luan van dinh doanh")).
• Removing quotes may allow a broader search: (( trieu thi loan van kinh doanh ) or ( trien thi luan van dinh doanh )).
• Adding a wildcard symbol may retrieve word variants: (("trieu thi loan van kinh doanh") or ("trien thi luan van dinh doanh"))*.