Perhaps you should try some spelling variations:
activation microarray » annotation microarray, applications microarray, generation microarray
programming function » programming functional, programming functionals, programme function
variogram activation » variogram estimation, various activation
function variogram » function program
microarray https » microarrays https, microarray chips, microscopy https

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• Performing a fuzzy search may retrieve terms with similar spellings: programming function variogram activation microarray https~.
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