Perhaps you should try some spelling variations:
"mdgs oriented research : july 2008" » "mdgs related research : july 2008", "mdgs extended research : july 2008", "mdg oriented research : july 2008", "model oriented research : july 2008", "mdgs oriented research : july 2013", "mdgs oriented research : july 2012", "mdgs oriented research : july 2020"
"meet vaccine research : july 2007" » "meet medicine research : july 2007", "media vaccine research : july 2007", "ant vaccine research : july 2007", "mr vaccine research : july 2007", "meet vaccine research : july 2013", "meet vaccine research : july 2012", "meet vaccine research : july 2020"

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: (("mdgs oriented research : july 2008") or ("meet vaccine research : july 2007"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mdgs oriented research : july 2008") OR ("meet vaccine research : july 2007")).
• Removing quotes may allow a broader search: (( mdgs oriented research : july 2008 ) or ( meet vaccine research : july 2007 )).
• Adding a wildcard symbol may retrieve word variants: (("mdgs oriented research : july 2008") or ("meet vaccine research : july 2007"))*.