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