Perhaps you should try some spelling variations:
"first grand specific document" » "first grand scientific documents", "first gland specific document", "first glands specific document", "first wran specific document", "first rank specific document", "first hand specific document", "first grade specific document"
"first strand specific document" » "first strand scientific documents", "first strains specific document", "first strange specific document", "first storage specific document"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"first grand specific document\") OR (\"first strand specific document\"))".
• Removing quotes may allow a broader search: (( first grand specific document ) OR ( first strand specific document )).
• Adding a wildcard symbol may retrieve word variants: (("first grand specific document") OR ("first strand specific document"))*.