Perhaps you should try some spelling variations:
some prescriptions » some prescription, some descriptions, one prescription
2c prescriptions » tcm prescriptions, _ prescriptions, 2 prescription
2.2 receipts » 2.3 receipts, 25 receipts, 6.2 receipt
2f formulae » 2 formulae, dnf formulae, 2.8 formulae
20 formulae » 10 formulae, 2 formulae, 20 formula
2f early » 24 early, 20 early, 21 early

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: "%22medicine %((2f formulae) OR (20 formulae))%2.2 receipts%((2c prescriptions) OR (some prescriptions)) %2f early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2f formulae) OR (20 formulae))%2.2 receipts%((2c prescriptions) OR (some prescriptions)) %2f early works to 1800%22*.