There is at present no quick or easy way to answer the question "Which OOo files contain {some text 
string}." Because they are stored in a compressed xml format, you can't use grep-like tools, and 
these don't, in any case, exist in any easily accessible or generally distributed form on 
Windows. 

But if OO is in general use in any kind of office or business, the need to be able to 
search and index correspondence and other files is going to be immense. MS Office does this 
badly. Word Perfect does it very well. There used to be a number of 3rd party utilities which did it 
on Windows, but these seem all to have been crushed by Microsoft. In any case, they none of them 
knew about the OO XML format; and this is really a facility which the program ought to offer 
itself. 

I don't know whether it requires a separate indexing run, like MS's deeply 
unpopular "fast find". But at the very least, OO ought to offer, integrated into the main menu 
system, a way to search given directory trees for OO files containing specified content (and 
ideally using the various document properties too) and to open them. Otherwise, it becmoes very 
noticeably les useful once you have more than about 50 documents in it, and any thriving business 
can expect rapidly to accuumlate a thousand times as many.