Perhaps you should try some spelling variations:
2.2 archaeometallurgy » _ archaeometallurgy, 1 archaeometallurgy, 10 archaeometallurgy
27 metallurgy » _ metallurgy
sc methyl » 11c methyl, 13c methyl, ns5 methyl
27 maldi » 17 maldi, 7 maldi, _ maldi
c methyl » _ methyl, n methyl, 2 methyl
2 maldi » 12 maldi, _ maldi, a maldi

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: %22archaeology%27 metallurgy%((2 maldi) OR (27 maldi))%a thesis%2.2 archaeometallurgy%((sc methyl) OR (c methyl))%22.
• Adding a wildcard symbol may retrieve word variants: %22archaeology%27 metallurgy%((2 maldi) or (27 maldi))%a thesis%2.2 archaeometallurgy%((sc methyl) or (c methyl))%22*.