Perhaps you should try some spelling variations:
"descriptions based" » "description based", "descriptors based", "descriptions a"
"descriptions phase" » "descriptions plate", "descriptions places", "descriptions part"
"descriptive phase" » "descriptive plates", "descriptive clause", "descriptive image"
"descriptive case" » "descriptive clause", "descriptive based", "descriptive name"
"description case" » "description causes", "description based", "description des"

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: (((("descriptive phase") OR ((("descriptive case") OR ("description case"))))) OR ((("descriptions phase") OR ((("descriptions based") OR ("descriptor based")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"descriptive phase\") or (((\"descriptive case\") or (\"description case\"))))) or (((\"descriptions phase\") or (((\"descriptions based\") OR (\"descriptor based\"))))))".
• Removing quotes may allow a broader search: (((( descriptive phase ) or ((( descriptive case ) or ( description case ))))) or ((( descriptions phase ) or ((( descriptions based ) OR ( descriptor based )))))).
• Adding a wildcard symbol may retrieve word variants: (((("descriptive phase") or ((("descriptive case") or ("description case"))))) or ((("descriptions phase") or ((("descriptions based") OR ("descriptor based"))))))*.