Perhaps you should try some spelling variations:
"descriptions phase" » "descriptions plate", "descriptions places", "descriptions based"
"descriptive phase" » "descriptive case", "descriptive plates", "descriptive clause"
"descriptors based" » "descriptor based", "descriptors a"
"description based" » "descriptor 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 ((("descriptions phase") OR ((("descriptors based") OR ("description based")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"descriptive phase\") or (((\"descriptions phase\") or (((\"descriptors based\") OR (\"description based\"))))))".
• Removing quotes may allow a broader search: (( descriptive phase ) or ((( descriptions phase ) or ((( descriptors based ) OR ( description based )))))).
• Adding a wildcard symbol may retrieve word variants: (("descriptive phase") or ((("descriptions phase") or ((("descriptors based") OR ("description based"))))))*.