Perhaps you should try some spelling variations:
2.8 formulae » 2.9 formulae, 12.8 formulare, 18 formulae
25 receipts » 5 receipts, _ receipts, c receipts
20 formule » 20 formulae, 20 formula, 10 formulae
2 formulae » 20 formulae, _ formulae, 2 formulas
2f early » 20 early, 22 early, f early
21 early » 2.1 early, 1 early, 11 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 %((2.8 formulae) OR (((20 formule) OR (2 formulae))))%25 receipts%_ prescriptions %((2f early) OR (21 early)) works to 1800%22.
• Adding a wildcard symbol may retrieve word variants: %22medicine %((2.8 formulae) or (((20 formule) or (2 formulae))))%25 receipts%_ prescriptions %((2f early) or (21 early)) works to 1800%22*.