There is an announcement, but there is no text

The seduction that happened the second time in my day. I am looking for all the materials on the site by keyword ... Among those found there is a preview of the announcement of the material (column). I want to read it in its entirety, I click - error 404. After a few hours, the material became available.

For example, now I search for Google . I see in the found column "The rudiments of Google Office". Trying to go read - error 404 ...