Perhaps you should try some spelling variations:
2c archaeometallurgy » 2.2 archaeometallurgy, _ archaeometallurgy, 1 archaeometallurgy
2 metallurgy » 27 metallurgy, 12 metallurgy, _ metallurgy
2c metal » c metal, ic metal, sc metal
a thesis » _ thesis
25 maii » 25 mai, 25 main, 15 maii
26 maii » 26 mai, 26 martii
20 maii » 20 mai, 30 maii, 2 maii
2 mali » 2 maldi, 2 male, 2 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%2 metallurgy%((((2 mali) OR (20 maii))) OR (((25 maii) OR (26 maii))))%a thesis%2c archaeometallurgy%2c metal%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22archaeology%2 metallurgy%((((2 mali) or (20 maii))) or (((25 maii) OR (26 maii))))%a thesis%2c archaeometallurgy%2c metal%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%2 metallurgy%((((2 mali) or (20 maii))) or (((25 maii) OR (26 maii))))%a thesis%2c archaeometallurgy%2c metal%22*.