$("#pesquisa").typeahead({
                source: function (query) {
                    return $.get("/Estabelecimento/GetDados", { q: query });
                },
                minLength: 3
            });

<div class="container">
    <div class="row">
        <div class="col-md-12">
            <div class="input-group">
                <input type="text" id="pesquisa" name="pesquisa"  class="form-control typeahead" autocomplete="off" placeholder="Pesquisar" />
                <div class="input-group-btn"><button class="btn btn-primary">Pesquisar</button></div>

            </div>
        </div>
    </div>
</div>

["Americanas", "Apple", "C & A", "Carrefour", "Microsfot", "Riachuelo", "Saraiva", "Sony"]