Perhaps you should try some spelling variations:
"spatial concentration camp" » "spectral concentration camp", "initial concentration camp", "metal concentration camp", "spatial concentration camps"
"spatial configuration cache" » "initial configuration cache", "partial reconfiguration cache", "material configurations cache", "spatial configuration caching", "spatial configuration change", "spatial configuration c.e"
"spatial configuration ch" » "initial configuration ch", "partial reconfiguration ch", "material configurations ch", "spatial configuration chapter", "spatial configuration changes"

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: (("spatial concentration camp") OR ((("spatial configuration cache") OR ("spatial configuration ch")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"spatial concentration camp\") or (((\"spatial configuration cache\") OR (\"spatial configuration ch\"))))".
• Removing quotes may allow a broader search: (( spatial concentration camp ) or ((( spatial configuration cache ) OR ( spatial configuration ch )))).
• Adding a wildcard symbol may retrieve word variants: (("spatial concentration camp") or ((("spatial configuration cache") OR ("spatial configuration ch"))))*.