Perhaps you should try some spelling variations:
"spatial concentration camp" » "spectral concentration camp", "initial concentration camp", "metal concentration camp", "spatial concentration camps"
"spatial configuration camp" » "partial reconfiguration camp", "material configurations camp", "spatial configuration camera", "spatial configuration sample", "spatial configuration class"
"spatial configuration cache" » "partial reconfiguration cache", "material configurations cache", "spatial configuration caching", "spatial configuration change", "spatial configuration ch"
"initial configuration camp" » "initial considerations camp", "initial configuration camera", "initial configuration sample", "initial configuration class"

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