Forgive my exasperation, I've said this about 250 times now
When the site crashed it took hardware with it, we're running on an under-specified configuration that is less than ideal and unable to cope with the load. The SQL databases are distributed too far over a less than ideal network connection; the result is that the servers are uanble to sustain the traffic volume coupled with comprehensive database activity.
All I can offer you is to
a. Search over smaller time periods
b. Search titles only
c. search as specifically as you can - i.e. by author, phrase instead of 'any' keywords
