Perhaps you should try some spelling variations:
"descriptive clause" » "descriptive case", "descriptive claims", "descriptions clauses"
"descriptions phase" » "descriptions plate", "descriptions places", "descriptions based"
"descriptive phase" » "descriptive case", "descriptive plates", "descriptive image"

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