How to use “And” clause in Firebase Query

Question

We are developing hybrid mobile app using Angular2 and ionic2 and Firebase. We post data into firebase .We data like this

PinCode       blood group   Name           Age
--------      -----        ------         ------
534401         B+           Pavan          24
400084         A+           Alapati        35 
534333         B+           Sai            22

if user select Pincode:534401 and blood group:B+. We need show particular record data only.We tried like this

     this.showData = this.afd.list('/blooddetails/').$ref.orderByChild("pincode").equalTo(formData.pincode).ref.orderByChild("groupname").equalTo(formData.groupname);
        this.showData.on('child_added', function(data) {
        console.log(JSON.stringify(data));  
});

but we are getting OR case.We got two record form above table.first and last record.We need AND case.We tried Query also

this.showData = this.afd.list('/blooddetails/', {
  query: {
    pincode: formData.pincode,
    groupname: formData.groupname,
  }
});

But no lucky .Guide to us what we miss.