Perhaps you should try some spelling variations:
practitioner literature » practice literature, practices literature, practitioner interaction
practitioner signature » partitioned signature, practitioner cognitive, practitioner share
practitioner library » practitioners summary, practitioners primary, practitioner may
lean practitioner » a practitioner, late practitioner, new practitioner
criminal lean » criminal legal, criminal en, criminal la

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: (( international criminal law ((practitioner library) OR (practitioner literature)) ) OR ( international criminal lean practitioner signature )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( international criminal law ((practitioner library) OR (practitioner literature)) ) or ( international criminal lean practitioner signature ))".
• Adding a wildcard symbol may retrieve word variants: (( international criminal law ((practitioner library) OR (practitioner literature)) ) or ( international criminal lean practitioner signature ))*.