Perhaps you should try some spelling variations:
"aids vaccine research : july 2006" » "aids medicine research : july 2006", "aids vaccine research : july 2008", "aids vaccine research : july 2007", "aids vaccine research : july 2009", "aid vaccine research : july 2006"
"aims vaccine research : july 2006" » "aims medicine research : july 2006", "aids vaccines research : july 2006", "hiv vaccine research : july 2006", "a vaccine research : july 2006", "aims vaccine research : july 2008", "aims vaccine research : july 2007", "aims vaccine research : july 2009"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("aids vaccine research : july 2006") OR ("aims vaccine research : july 2006"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"aids vaccine research : july 2006\") OR (\"aims vaccine research : july 2006\"))".
• Removing quotes may allow a broader search: (( aids vaccine research : july 2006 ) OR ( aims vaccine research : july 2006 )).
• Adding a wildcard symbol may retrieve word variants: (("aids vaccine research : july 2006") OR ("aims vaccine research : july 2006"))*.