Perhaps you should try some spelling variations:
"elgar original references" » "elgar origin references", "elgar origins references", "elgar marginal references", "angr original references", "einer original references"
vector retrieval » trajectory retrieval
elgar retrieval » delay retrieval, algebra retrieval, filter retrieval

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("((elgar retrieval) OR (vector retrieval)) conference") OR ("elgar original references"))*.
• Removing quotes may allow a broader search: (( ((elgar retrieval) OR (vector retrieval)) conference ) or ( elgar original references ))*.