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