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, 20 formula, 20 formule
2c receipts » c receipts, 25 receipts, 2.2 receipts
2 formulae » _ formulae, 2 formulas, a formulae
2f early » 20 early, 21 early, 22 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) OR (2 formulae))))%2c receipts%2c prescriptions %2f 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) OR (2 formulae))))%2c receipts%2c prescriptions %2f early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2.8 formulae) or (((20 formulae) OR (2 formulae))))%2c receipts%2c prescriptions %2f early works to 1800%22*.