Perhaps you should try some spelling variations:
"mdgs oriented research : july 2006" » "mdgs related research : july 2006", "mdgs extended research : july 2006", "mdg oriented research : july 2006", "model oriented research : july 2006", "mdgs oriented research : july 2008", "mdgs oriented research : july 2007", "mdgs oriented research : july 2009"
"meet vaccine research : july 2013" » "meet medicine research : july 2013", "media vaccine research : july 2013", "ant vaccine research : july 2013", "mr vaccine research : july 2013"

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 2006") OR ("meet vaccine research : july 2013"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"mdgs oriented research : july 2006\") OR (\"meet vaccine research : july 2013\"))".
• Removing quotes may allow a broader search: (( mdgs oriented research : july 2006 ) OR ( meet vaccine research : july 2013 )).
• Adding a wildcard symbol may retrieve word variants: (("mdgs oriented research : july 2006") OR ("meet vaccine research : july 2013"))*.