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
11 formulae » 11 formulas, 10 formulae, 17 formulae
21 early » 2.1 early, 1 early, 11 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 (11 formulae))%all receipts%2c prescriptions %21 early works to 1800%22.
• Adding a wildcard symbol may retrieve word variants: %22medicine %((dnf formulae) or (11 formulae))%all receipts%2c prescriptions %21 early works to 1800%22*.