Perhaps you should try some spelling variations:
2c thesis » _ thesis, a thesis, my thesis
2c metal » c metal, ic metal, wc metal
sc metal » sic metal, c metal, ic metal
2 thesis » 2 thess, 2 themes, 2 thesen
2 maldi » 12 maldi, 27 maldi, _ maldi
2 theil » 2 theilen

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 maldi%((2c thesis) OR (((2 thesis) OR (2 theil))))%_ 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 maldi%((2c thesis) or (((2 thesis) OR (2 theil))))%_ archaeometallurgy%((2c metal) or (sc metal))%22".
• Adding a wildcard symbol may retrieve word variants: %22archaeology%((2c metal) or (sc metal))lurgy%2 maldi%((2c thesis) or (((2 thesis) OR (2 theil))))%_ archaeometallurgy%((2c metal) or (sc metal))%22*.