Perhaps you should try some spelling variations:
2c archaeometallurgy » 2.2 archaeometallurgy, _ archaeometallurgy, 1 archaeometallurgy
c metallurgy » _ metallurgy, v metallurgy, 2 metallurgy
4 metallurgy » _ metallurgy, v metallurgy, 27 metallurgy
2 maldi » 12 maldi, 27 maldi, a 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 (4 metallurgy))%((((2 maldi) OR (_ maldi))) OR (1((2 maldi) OR (_ maldi))))%a thesis%2c archaeometallurgy%c metal%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22archaeology%((c metallurgy) or (4 metallurgy))%((((2 maldi) OR (_ maldi))) or (1((2 maldi) OR (_ maldi))))%a thesis%2c archaeometallurgy%c metal%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%((c metallurgy) or (4 metallurgy))%((((2 maldi) OR (_ maldi))) or (1((2 maldi) OR (_ maldi))))%a thesis%2c archaeometallurgy%c metal%22*.