Perhaps you should try some spelling variations:
2.2 archaeometallurgy » _ archaeometallurgy, 1 archaeometallurgy, 10 archaeometallurgy
27 metallurgy » _ metallurgy
c metallurgy » _ metallurgy, 4 metallurgy, v metallurgy
2 maldi » 12 maldi, 27 maldi, _ maldi
c metal » sic metal, c 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%((c metallurgy) OR (27 metallurgy))%2 maldi%_ thesis%2.2 archaeometallurgy%c metal%22.
• Adding a wildcard symbol may retrieve word variants: %22archaeology%((c metallurgy) or (27 metallurgy))%2 maldi%_ thesis%2.2 archaeometallurgy%c metal%22*.