Perhaps you should try some spelling variations:
2c metallurgy » 27 metallurgy, 2 metallurgy, 10 metallurgy
2c thesis » 2 thesis, _ thesis, a thesis
27 maldi » 17 maldi, 7 maldi, 27 mai
2c metal » c metal, ic metal, sc metal
2 maldi » 12 maldi, a maldi, 2 maedi

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 (_ metallurgy))%((((2 maldi) OR (27 maldi))) OR (_ maldi))%2c thesis%_ archaeometallurgy%2c metal%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22archaeology%((2c metallurgy) or (_ metallurgy))%((((2 maldi) OR (27 maldi))) or (_ maldi))%2c thesis%_ archaeometallurgy%2c metal%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%((2c metallurgy) or (_ metallurgy))%((((2 maldi) OR (27 maldi))) or (_ maldi))%2c thesis%_ archaeometallurgy%2c metal%22*.