Perhaps you should try some spelling variations:
_ estimate » _ estimation, _ estimating
2f estate » 24 estate, 27 estate, ai estate
_ estate » _ estates
2c john » c john, 22 john, 21 john
23 john » 13 john
12 john » 11 john
2 john » 1 john, 4 john, 5 john
3 john » 1 john, 4 john

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: %22orlebar%((2c john) OR (((((2 john) OR (((23 john) OR (3 john))))) OR (12 john)))) %((2f estate) OR (((_ estate) OR (_ estimate))))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22orlebar%((2c john) or (((((2 john) or (((23 john) or (3 john))))) or (12 john)))) %((2f estate) or (((_ estate) OR (_ estimate))))%22".
• Adding a wildcard symbol may retrieve word variants: %22orlebar%((2c john) or (((((2 john) or (((23 john) or (3 john))))) or (12 john)))) %((2f estate) or (((_ estate) OR (_ estimate))))%22*.