Perhaps you should try some spelling variations:
descriptions based » description based, descriptors based, descriptor based
descriptive phase » descriptive plates, descriptions phase, descriptive clause
descriptive case » descriptive clause, descriptive based, description case

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"((descriptive phase) OR (descriptive case))\\") or (\\"descriptions based\\"))\"".
• Removing quotes may allow a broader search: (( ((descriptive phase) OR (descriptive case)) ) or ( descriptions based )).