Perhaps you should try some spelling variations:
2c prescriptions » tcm prescriptions, _ prescriptions, 2 prescription
2.8 formulae » 2.9 formulae, 12.8 formulare, 18 formulae
20 formulae » 10 formulae, 2 formulae, 20 formula
2c receipts » c receipts, 25 receipts, 2.2 receipts
2f early » 20 early, ef early, f early
21 early » 2.1 early, 1 early, 11 early

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 %((2.8 formulae) OR (20 formulae))%2c receipts%2c prescriptions %((2f early) OR (21 early)) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22medicine %((2.8 formulae) or (20 formulae))%2c receipts%2c prescriptions %((2f early) OR (21 early)) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2.8 formulae) or (20 formulae))%2c receipts%2c prescriptions %((2f early) OR (21 early)) works to 1800%22*.