Perhaps you should try some spelling variations:
2c prescriptions » tcm prescriptions, _ prescriptions, 2 prescription
all receipts » sale receipts, also receipts, bills receipts
20 formulae » 10 formulae, 20 formule, 2.8 formulae
2 formulae » _ formulae, 2 formulas, a formulae
20 formula » 2 formula, 25 formula, 20 formule
c receipts » _ receipts, new receipts, iii receipts
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 %((2 formulae) OR (((20 formulae) OR (20 formula))))%((c receipts) OR (all receipts))%2c prescriptions %2f early works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22medicine %((2 formulae) or (((20 formulae) OR (20 formula))))%((c receipts) or (all receipts))%2c prescriptions %2f early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2 formulae) or (((20 formulae) OR (20 formula))))%((c receipts) or (all receipts))%2c prescriptions %2f early works to 1800%22*.