Perhaps you should try some spelling variations:
2 prescription » 12 prescription, 21 prescription, 22 prescription
2 formulae » 20 formulae, _ formulae, 2 formulas
25 formula » 2 formula, 5 formula, _ formula
c receipts » _ receipts, new receipts, all receipts
1720 early » 1727 early, 1820 early, 1770 early
2f early » 24 early, 21 early, 22 early
20 early » 10 early, 1820 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 (25 formula))%c receipts%2 prescription %((((2f early) OR (20 early))) OR (1720 early)) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22medicine %((2 formulae) or (25 formula))%c receipts%2 prescription %((((2f early) OR (20 early))) or (1720 early)) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2 formulae) or (25 formula))%c receipts%2 prescription %((((2f early) OR (20 early))) or (1720 early)) works to 1800%22*.