There is an announcement, but there is no text

The situation that happened the second time in a day with me. I am looking for all the materials on the site by keyword ... Among the found there is an announcement 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 ’m looking for Google . I see in the found column "The beginnings of Google Office." Trying to come in to read - error 404 ...