As the title. Search the words "foo bar" (separated by a space) can't find the bookmark with title "foobar" (no space in it).
To reproduce, add this page Surfingkeys as bookmark, then search "surfing keys" (separated by a space), the bookmark doesn't appear in search results. Delete the space and search again (search word "surfingkeys"), the bookmark immediately appeared.
It's strange for not like normal search engine behaviors.