Perhaps you should try some spelling variations:
2c metallurgy » 27 metallurgy, 2 metallurgy, _ metallurgy
2c metal » c metal, ic metal, sc metal
20 maii » 20 mai, 30 maii, 26 maii
25 maii » 25 mai, 25 main, 26 maii
2 mali » 2 maldi, 2 male
2 maii » 26 maii, 28 maii, 29 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 metallurgy%((((2 mali) OR (((2 maii) OR (20 maii))))) OR (25 maii))%a thesis%_ archaeometallurgy%2c metal%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22archaeology%2c metallurgy%((((2 mali) or (((2 maii) OR (20 maii))))) or (25 maii))%a thesis%_ archaeometallurgy%2c metal%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%2c metallurgy%((((2 mali) or (((2 maii) OR (20 maii))))) or (25 maii))%a thesis%_ archaeometallurgy%2c metal%22*.