Perhaps you should try some spelling variations:
21 prescription » 2.1 prescription, 11 prescription, 1 prescription
2 prescription » 12 prescription, 22 prescription, 27 prescription
20 formulae » 10 formulae, 20 formula, 20 formule
2 formulae » _ formulae, 2 formulas, a formulae
c receipts » _ receipts, new receipts, all receipts
2f early » 20 early, 21 early, ef 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 %((2 formulae) OR (20 formulae))%c receipts%((2 prescription) OR (21 prescription)) %2f early works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22medicine %((2 formulae) or (20 formulae))%c receipts%((2 prescription) OR (21 prescription)) %2f early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2 formulae) or (20 formulae))%c receipts%((2 prescription) OR (21 prescription)) %2f early works to 1800%22*.