What kind of a search are you referring to here? Ctrl+Dot (push-tag), Ctrl+/ (references), a traditional text search (single file, regex, multi-file?), or Find Symbol tool window? Sample source is helpful if it was a tagging issue.
Also, if you killed your editor, you could have left the tag files in a corrupt state, I would recommend rebuilding the workspace tag file from scratch (Project > Rebuild Tag File...)