Perhaps you should try some spelling variations:
tcm prescriptions » tcm prescription, some prescriptions, test prescriptions
2c prescriptions » _ prescriptions, 2 prescription, 21 prescription
dnf formulae » dnf formulas, cdnf formulas, cnf formulas
2f formulae » 2 formulae, 20 formulae, 2.8 formulae
c receipts » new receipts, all receipts, iii receipts
20 early » 10 early, 1820 early, 1720 early

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 (dnf formulae))%((2((c receipts) OR (_ receipts))) OR (((c receipts) OR (_ receipts))))%((2c prescriptions) OR (tcm prescriptions)) %20 early works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22medicine %((2f formulae) or (dnf formulae))%((2((c receipts) OR (_ receipts))) or (((c receipts) OR (_ receipts))))%((2c prescriptions) or (tcm prescriptions)) %20 early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2f formulae) or (dnf formulae))%((2((c receipts) OR (_ receipts))) or (((c receipts) OR (_ receipts))))%((2c prescriptions) or (tcm prescriptions)) %20 early works to 1800%22*.