Perhaps you should try some spelling variations:
"descriptive clause" » "descriptive case", "descriptive claims", "descriptions clauses"
"descriptions based" » "description based", "descriptors based", "descriptor based"
"descriptive phase" » "descriptive case", "descriptive plates", "descriptions phase"
"descriptions part" » "description part", "descriptions a", "descriptions _"
"descriptors part" » "descriptors a", "description part", "descriptors based"

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