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

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