Perhaps you should try some spelling variations:
2c archaeometallurgy » 2.2 archaeometallurgy, _ archaeometallurgy, 1 archaeometallurgy
4 metallurgy » _ metallurgy, v metallurgy, 27 metallurgy
127 maldi » 12 maldi, 17 maldi, 16 maldi
27 maldi » 17 maldi, 2 maldi, 7 maldi
a thesis » _ thesis
c methyl » _ methyl, n methyl, 2 methyl

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%4 metallurgy%((27 maldi) OR (127 maldi))%a thesis%2c archaeometallurgy%c methyl%22.
• Adding a wildcard symbol may retrieve word variants: %22archaeology%4 metallurgy%((27 maldi) or (127 maldi))%a thesis%2c archaeometallurgy%c methyl%22*.