Perhaps you should try some spelling variations:
21 prescription » 2.1 prescription, 11 prescription, 1 prescription
2 prescription » 12 prescription, 22 prescription, 27 prescription
2 formulas » _ formulas, 3 formulas, cnf formulas
20 formula » 20 formulae, 2 formula, 25 formula
c receipts » _ receipts, new receipts, all receipts
2f early » 24 early, 20 early, 21 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 formulas) OR (20 formula))%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 formulas) or (20 formula))%c receipts%((2 prescription) OR (21 prescription)) %2f early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2 formulas) or (20 formula))%c receipts%((2 prescription) OR (21 prescription)) %2f early works to 1800%22*.