To Baidu Cloud network as an example, we choose a Baidu cloud we can find to share the file to analyze its URL, its Web site under the domain name of the indexed content is almost all share files, therefore, we only need to use pure site search, you can search a large number of network disk files
With "Site: Network disk site domain name" search expression to search, Baidu included in the network disk of all the files came out. Note that the colon in the expression is a half-width symbol (a colon in the English Input method state), with no spaces after the colon. After such a site search, we can also prove Baidu index Baidu cloud domain name under the content, indeed almost all are sharing documents.
The search results obtained in the previous step are too complicated to select, so we need to do a precise search, as shown in the following figure, we can add our own interesting keywords for a comprehensive search, you can see the results of the search is very accurate. Notice that a space is required between the search expression in the station and a keyword that follows.