A correct search query includes several words. One word entered as a search query is too vague and makes it hard to understand what you are looking for.
For example, the search query update may mean update of anti-virus databases, or update the program to its latest version, or update of the program license. When the update query is received, the search engine will show you results for all types of updates.
If you need to see information about update of anti-virus databases, then narrow down your search query to update anti-virus databases.