Perhaps you should try some spelling variations:
"housing and human habits" » "housing and human hybrids", "housing and human hair", "housing and human traits", "focusing and human habits"
"housing and human hearts" » "housing and human heart", "housing and human health", "housing and human hearing", "focusing and human hearts"
"housing and human habitats" » "focusing and human habitats"
"housing and human habitat" » "focusing and human habitat"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("housing and human habitats") OR ((((("housing and human habits") OR ("housing and human hearts"))) OR ("housing and human habitat")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"housing and human habitats\") or (((((\"housing and human habits\") OR (\"housing and human hearts\"))) or (\"housing and human habitat\"))))".
• Removing quotes may allow a broader search: (( housing and human habitats ) or ((((( housing and human habits ) OR ( housing and human hearts ))) or ( housing and human habitat )))).
• Adding a wildcard symbol may retrieve word variants: (("housing and human habitats") or ((((("housing and human habits") OR ("housing and human hearts"))) or ("housing and human habitat"))))*.