Perhaps you should try some spelling variations:
2c archaeometallurgy » 2.2 archaeometallurgy, 1 archaeometallurgy, 10 archaeometallurgy
_ archaeometallurgy » _ archaeometallurgical, archaeometallurgy _
27 metallurgy » _ metallurgy
2c metallurgy » 2 metallurgy, _ metallurgy, 10 metallurgy
2c thesis » 2 thesis, _ thesis, a thesis
2c metal » c metal, ic metal, sc metal
17 maldi » 12 maldi, 16 maldi, 7 maldi
27 maldi » 2 maldi, 7 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%((2c metallurgy) OR (27 metallurgy))%((27 maldi) OR (17 maldi))%2c thesis%((2c archaeometallurgy) OR (_ archaeometallurgy))%2c metal%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22archaeology%((2c metallurgy) or (27 metallurgy))%((27 maldi) OR (17 maldi))%2c thesis%((2c archaeometallurgy) or (_ archaeometallurgy))%2c metal%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%((2c metallurgy) or (27 metallurgy))%((27 maldi) OR (17 maldi))%2c thesis%((2c archaeometallurgy) or (_ archaeometallurgy))%2c metal%22*.