Perhaps you should try some spelling variations:
"plant accident research : july 2006" » "plant current research : july 2006", "plant recent research : july 2006", "plant vaccine research : july 2006", "plant accident research : july 2008", "plant accident research : july 2007", "plant accident research : july 2009", "plants accident research : july 2006", "plan accident research : july 2006", "plans accident research : july 2006"
"heat climate research : july 2011" » "health climate research : july 2011", "threat climate research : july 2011", "best climate research : july 2011", "heat climate research : july 2013", "heat climate research : july 2012", "heat climate research : july 2015"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("heat climate research : july 2011") or ("plant accident research : july 2006"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("heat climate research : july 2011") OR ("plant accident research : july 2006")).
• Removing quotes may allow a broader search: (( heat climate research : july 2011 ) or ( plant accident research : july 2006 )).
• Adding a wildcard symbol may retrieve word variants: (("heat climate research : july 2011") or ("plant accident research : july 2006"))*.