new sap.ui.model.Filter("field-A", sap.ui.model.FilterOperator.NE, "O");
new sap.ui.model.Filter("field-B", sap.ui.model.FilterOperator.contains, search-text);
new sap.ui.model.Filter("field-C", sap.ui.model.FilterOperator.contains, search-text);

getInitialFilter: function() {
  return new Filter("Field-A", FilterOperator.NE, "O");
}

getSearchFilters: function(query) {
  return new Filter({
    filters: [
      new Filter("Field-B", FilterOperator.Contains, query),
      new Filter("Field-C", FilterOperator.Contains, query)
    ],
    and: false
  });
}

onSearch: function(event) {
  this.getList().getBinding("items").filter(new Filter({
    filters: [
      this.getInitialFilter(),
      this.getSearchFilters(event.getParameter("query"))
    ],
    and: true
  }));
}

var andFilter = [];

var orFilter = [];

orFilter.push(new sap.ui.model.Filter("title", sap.ui.model.FilterOperator.Equal, "filtervalue"));

orFilter.push(new sap.ui.model.Filter("status", sap.ui.model.FilterOperator.Equal, "filtervalue"));

andFilter.push(new sap.ui.model.Filter(orFilter, false));

orFilter = [];

orFilter.push(new sap.ui.model.Filter("title", sap.ui.model.FilterOperator.Equal, "filtervalue1"));

orFilter.push(new sap.ui.model.Filter("status", sap.ui.model.FilterOperator.Equal, "filtervalue1"));

andFilter.push(new sap.ui.model.Filter(orFilter, false));

oBinding.filter(new sap.ui.model.Filter(andFilter, true));

title=filtervalue || status=filtervalue && title=filtervalue1 || status=filtervalue1