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

• Performing a fuzzy search may retrieve terms with similar spellings: multi ((((accident research) OR (action research))) or (national research)) : july 2009~.
• If you are trying to use Boolean operators, they must be ALL CAPS: multi ((((accident research) OR (action research))) OR (national research)) : july 2009.
• The words AND, OR and NOT may confuse the search; try adding quotes: "multi ((((accident research) OR (action research))) or (national research)) : july 2009".
• Adding a wildcard symbol may retrieve word variants: multi ((((accident research) OR (action research))) or (national research)) : july 2009*.