Perhaps you should try some spelling variations:
2.2 archaeometallurgy » _ archaeometallurgy, 1 archaeometallurgy, 10 archaeometallurgy
27 metallurgy » _ metallurgy
27 maldi » 17 maldi, 2 maldi, 7 maldi
sc metal » sic metal, ic metal, wc metal
a maldi » _ maldi, lc maldi, ms maldi
c metal » sic metal, c methyl

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%27 metallurgy%((a maldi) OR (27 maldi))%a thesis%2.2 archaeometallurgy%((sc metal) OR (c metal))%22.
• Adding a wildcard symbol may retrieve word variants: %22archaeology%27 metallurgy%((a maldi) or (27 maldi))%a thesis%2.2 archaeometallurgy%((sc metal) or (c metal))%22*.