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