Perhaps you should try some spelling variations:
"descriptions clauses" » "descriptions causes", "description causes", "descriptions uses"
"descriptions phase" » "descriptions plate", "descriptions places", "descriptions part"
"descriptions based" » "description based", "descriptors based", "descriptor 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: (("descriptions clauses") OR ((("descriptions phase") OR ("descriptions based")))).
• Removing quotes may allow a broader search: (( descriptions clauses ) or ((( descriptions phase ) or ( descriptions based )))).
• Adding a wildcard symbol may retrieve word variants: (("descriptions clauses") or ((("descriptions phase") or ("descriptions based"))))*.