Perhaps you should try some spelling variations:
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"covariance function from coding program" » "covariance functions from coding program" (Expand search), "ovarian function from coding program" (Expand search), "covariance function from cloning program" (Expand search), "covariance function from loading program" (Expand search), "covariance function from cooling programs" (Expand search), "covariance function from decoding program" (Expand search), "covariance function from cooking program" (Expand search), "covariance function from codium program" (Expand search)

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