Pretty sure the answer is no. When doing the auto-complete speed would be very important and a name contains search can't really use indexes for speed whereas a begins with search can. The search would essentially become a linear search and with 17,000 items it would probably be painfully slow (it would have to search again after each character typed). So if you need a names contains search you will have to rely on good ol' F2. Some one correct me if you have better information, because I would love to have it be able to use a name contains too.
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