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
26 maii » 26 mai, 26 martii
2 male » 2 make
2 maii » 20 maii, 25 maii, 28 maii
25 mai » 25 may

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 male) OR (((2 maii) OR (26 maii))))) OR (25 mai))%a thesis%2c archaeometallurgy%2c metal%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22archaeology%2 metallurgy%((((2 male) or (((2 maii) OR (26 maii))))) or (25 mai))%a thesis%2c archaeometallurgy%2c metal%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%2 metallurgy%((((2 male) or (((2 maii) OR (26 maii))))) or (25 mai))%a thesis%2c archaeometallurgy%2c metal%22*.