Perhaps you should try some spelling variations:
2c archaeometallurgy » 2.2 archaeometallurgy, _ archaeometallurgy, 1 archaeometallurgy
2c thesis » _ thesis, a thesis, my thesis
2c metal » c metal, ic metal, sc metal
2 thesis » 2 thess, 2 theil, 2 themes
2 maldi » 12 maldi, 27 maldi, _ maldi
20 maii » 20 mai, 30 maii, 26 maii
2 maii » 26 maii, 25 maii, 28 maii
2 mali » 2 male

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 maldi))) OR (((2 maii) OR (20 maii))))%((2c thesis) OR (2 thesis))%2c archaeometallurgy%2c metal%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22archaeology%_ metallurgy%((((2 mali) or (2 maldi))) or (((2 maii) OR (20 maii))))%((2c thesis) or (2 thesis))%2c archaeometallurgy%2c metal%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%_ metallurgy%((((2 mali) or (2 maldi))) or (((2 maii) OR (20 maii))))%((2c thesis) or (2 thesis))%2c archaeometallurgy%2c metal%22*.