Leave it the way it is. As yet LW has not introduced the concept of quotation marks so they'd just be ignored. But you can experiment with the name b/c some people may label them differently & some even mispell/mislabel them. lol
For eg: Kill Bill - 2 or Kill Bill or Killbill or kill bil or Kill-bill or bill.avi, etc. And don't limit yourself to movie type searches. Sometimes a general type search can get you more results. Then must filter the results by clicking on the movie type to the left of the search results. Hope this is of some help.