Perhaps you should try some spelling variations:
simulation environments » simulation environment, population environment, population environmental
channels functions » channel functions, channel function, channel junction
chapter functions » chapter 2functions, taper functions, channel functions
concepts cases » concepts chapter

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• Performing a fuzzy search may retrieve terms with similar spellings: simulation environments ((chapter functions) or (channels functions)) concepts cases~.
• If you are trying to use Boolean operators, they must be ALL CAPS: simulation environments ((chapter functions) OR (channels functions)) concepts cases.
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