Perhaps you should try some spelling variations:
"descriptions clauses" » "descriptions causes", "description causes", "descriptions uses"
"descriptions phase" » "descriptions plate", "descriptions places", "descriptions based"
"descriptors based" » "descriptor based", "description based", "descriptors a"
"descriptions a" » "descriptions _"

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: (("descriptions clauses") OR ((("descriptions phase") OR ((("descriptions a") OR ("descriptors based")))))).
• Removing quotes may allow a broader search: (( descriptions clauses ) or ((( descriptions phase ) or ((( descriptions a ) or ( descriptors based )))))).
• Adding a wildcard symbol may retrieve word variants: (("descriptions clauses") or ((("descriptions phase") or ((("descriptions a") or ("descriptors based"))))))*.