Perhaps you should try some spelling variations:
2c prescriptions » tcm prescriptions, _ prescriptions, 2 prescription
2f formulae » 2 formulae, dnf formulae, 2.8 formulae
20 formulae » 10 formulae, 2 formulae, 20 formula
c receipts » new receipts, all receipts, iii receipts
11 early » 1 early, 5 early, 8 early

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: %22medicine %((2f formulae) OR (20 formulae))%((c receipts) OR (_ receipts))%2c prescriptions %((11 early) OR (1791 early)) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22medicine %((2f formulae) or (20 formulae))%((c receipts) or (_ receipts))%2c prescriptions %((11 early) OR (1791 early)) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2f formulae) or (20 formulae))%((c receipts) or (_ receipts))%2c prescriptions %((11 early) OR (1791 early)) works to 1800%22*.