Perhaps you should try some spelling variations:
"focusing and human habitat" » "focusing and human habitats"
"focusing and human habits" » "focusing and human habitats", "focusing and human hybrids", "focusing and human hair"

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: "((\"focusing and human habitat\") OR (\"focusing and human habits\"))".
• Removing quotes may allow a broader search: (( focusing and human habitat ) OR ( focusing and human habits )).
• Adding a wildcard symbol may retrieve word variants: (("focusing and human habitat") OR ("focusing and human habits"))*.