SOURCE

new Vue({
  el:"#app",
  data:{
    value:"",
    items:['k1','k2','k3','k4','k5','l1','l2','l3','l4','l5']
  },
  computed:{
    suggest:function(){
      var list = [];
      for(k in this.items){
        var suggestList = this.items[k];
        if("" != this.value && -1 != suggestList.iundexOf(this.value)){
          list.push(suggestList);
        }
      }
      return list;
    }
  }
});

<div id="app">
  <input type="text" v-model="value" />
  <p v-for="item in items" :key="item" v-show="value == item">{{item}}</p>
</div>