Google has launched a separate search engine just for downloading datasets in the month of September 2018. Have a look at it.
To create Dataset search, Google developed guidelines for dataset providers to describe their data in a way that the company (and other search engines) can better understand the content of their pages. These guidelines include salient information about datasets: who created the dataset, when it was published, how the data was collected, what the terms are for using the data, etc.
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