Perhaps you should try some spelling variations:
"tiep thi luan van dinh doanh" » "tiep thi luan van kinh doanh", "tiep thi luan van minh doanh", "tiep thi luan van chinh doanh", "tiep thi xuan van dinh doanh", "tiep thi loan van dinh doanh", "tiep thi thuan van dinh doanh", "tiep thi luan van dich doanh", "tiep thi luan va dinh doanh", "tien thi luan van dinh doanh", "tieu thi luan van dinh doanh"
"su thi lan van dinh doanh" » "su thi lan van kinh doanh", "su thi lan van minh doanh", "su thi lan van chinh doanh", "su thi lan van dich doanh", "su thi lan va dinh doanh", "su thi hanh van dinh doanh", "su thi nang van dinh doanh", "su thi lien van dinh doanh", "su thi lang van dinh doanh", "su thi tan van dinh doanh", "su thi san van dinh 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: (("tiep thi luan van dinh doanh") or ("su thi lan van dinh doanh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("tiep thi luan van dinh doanh") OR ("su thi lan van dinh doanh")).
• Removing quotes may allow a broader search: (( tiep thi luan van dinh doanh ) or ( su thi lan van dinh doanh )).
• Adding a wildcard symbol may retrieve word variants: (("tiep thi luan van dinh doanh") or ("su thi lan van dinh doanh"))*.