Perhaps you should try some spelling variations:
2c archaeometallurgy » 2.2 archaeometallurgy, _ archaeometallurgy, 1 archaeometallurgy
2c thesis » _ thesis, a thesis, my thesis
2 thesis » 2 thess, 2 theil
2 thesen » 12 thesen, 2 theilen, 2 thess
2 themes » 1 themes, 6 themes, 3 themes
2c metal » c metal, ic metal, sc metal
2 mali » 2 maldi, 2 male
2 maii » 26 maii, 20 maii, 25 maii

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