Perhaps you should try some spelling variations:
2 prescription » 12 prescription, 21 prescription, 22 prescription
2.8 formulae » 2.9 formulae, 12.8 formulare, 18 formulae
20 formulae » 10 formulae, 20 formule, 2.9 formulae
2 formulae » _ formulae, 2 formulas, a formulae
20 formula » 2 formula, 25 formula, 20 formule
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) OR (2.8 formulae))) OR (20 formula))))%c receipts%2 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) OR (2.8 formulae))) or (20 formula))))%c receipts%2 prescription %2f early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2 formulae) or (((((20 formulae) OR (2.8 formulae))) or (20 formula))))%c receipts%2 prescription %2f early works to 1800%22*.