Perhaps you should try some spelling variations:
probability matching » probability sampling, probability matrix, probability methods
statistical free » statistical force, statistical face, statistics free
free probability » some probability, discrete probability
collani e » collane _
collini e » collin _

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: "((collani e) OR (collini e)) statistical free probability matching".
• Adding a wildcard symbol may retrieve word variants: ((collani e) OR (collini e)) statistical free probability matching*.