Perhaps you should try some spelling variations:
nonadaptive single » nonadaptive signals, nonradioactive single, conductive single
22adaptive signal » adaptive signal, adaptive signals, nonadaptive signals
adaptive single » adaptive signal, adaptive scale, adaptive science

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: %((((22adaptive signal) OR (adaptive single))) OR (nonadaptive single)) processing%22.
• Adding a wildcard symbol may retrieve word variants: %((((22adaptive signal) or (adaptive single))) or (nonadaptive single)) processing%22*.