Perhaps you should try some spelling variations:
all receipts » sale receipts, also receipts, bills receipts
new receipts » best receipts, _ receipts
2f formulae » 2 formulae, 20 formulae, dnf formulae
20 formula » 20 formulae, 2 formula, 25 formula
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 %((2f formulae) OR (20 formula))%((all receipts) OR (new receipts))%_ prescriptions %2f early works to 1800%22.
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2f formulae) or (20 formula))%((all receipts) or (new receipts))%_ prescriptions %2f early works to 1800%22*.