Perhaps you should try some spelling variations:
2.2 archaeometallurgy » _ archaeometallurgy, 1 archaeometallurgy, 10 archaeometallurgy
2c archaeometallurgy » _ archaeometallurgy, 1 archaeometallurgy, 10 archaeometallurgy
2c metal » c metal, ic metal, wc metal
sc metal » sic metal, c metal, ic metal
2 thesis » 2 theil, 2 themes, 2 thesen
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%((2c metal) OR (sc metal))lurgy%2 maii%((a thesis) OR (((2 thesis) OR (2 thess))))%((2c archaeometallurgy) OR (2.2 archaeometallurgy))%((2c metal) OR (sc metal))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22archaeology%((2c metal) or (sc metal))lurgy%2 maii%((a thesis) or (((2 thesis) OR (2 thess))))%((2c archaeometallurgy) or (2.2 archaeometallurgy))%((2c metal) or (sc metal))%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%((2c metal) or (sc metal))lurgy%2 maii%((a thesis) or (((2 thesis) OR (2 thess))))%((2c archaeometallurgy) or (2.2 archaeometallurgy))%((2c metal) or (sc metal))%22*.