Perhaps you should try some spelling variations:
2c prescriptions » tcm prescriptions, _ prescriptions, 2 prescription
dnf formulae » dnf formulas, cdnf formulas, cnf formulas
all receipts » sale receipts, also receipts, bills receipts
new receipts » best receipts, _ receipts
20 formulae » 10 formulae, 2 formulae, 20 formula
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 %((dnf formulae) OR (20 formulae))%((all receipts) OR (new receipts))%2c prescriptions %2f early works to 1800%22.
• Adding a wildcard symbol may retrieve word variants: %22medicine %((dnf formulae) or (20 formulae))%((all receipts) or (new receipts))%2c prescriptions %2f early works to 1800%22*.