Perhaps you should try some spelling variations:
"description causes" » "description use", "description chapter", "description des"
"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: (("description causes") OR ((("descriptions phase") OR ("descriptions based")))).
• Removing quotes may allow a broader search: (( description causes ) or ((( descriptions phase ) or ( descriptions based )))).
• Adding a wildcard symbol may retrieve word variants: (("description causes") or ((("descriptions phase") or ("descriptions based"))))*.