什么是用于搜索的Retrofit OR运算符

我基本上想要搜索带有2个过滤器/标签的查询

（例如，2个国家的1个城市 - 美国或加拿大）

ElasticSearchAPi.java

public interface ElasticSearchAPI {
        @GET("_search/")
        Call search(
                @HeaderMap Map headers,
                @Query("default_operator") String operator,
                @Query("q") String query

        );
    }

Part of Search.java

Retrofit retrofit = new Retrofit.Builder()
                                .baseUrl(BASE_URL)
                                .addConverterFactory(GsonConverterFactory.create())
                                .build();

                        ElasticSearchAPI searchAPI = retrofit.create(ElasticSearchAPI.class);

                        HashMap headerMap = new HashMap();
                        headerMap.put("Authorization", Credentials.basic("user", mElasticSearchPassword));

                        String searchString = "";

                        if(!mSearchText.equals("")){
                            searchString = searchString + mSearchText.getText().toString() + "*";
                        }
                        if(!mPrefCountry.equals("")){
                            searchString = searchString + " country:" + mPrefCountry;
                        }

                        Call call = searchAPI.search(headerMap, "AND", searchString);

                        call.enqueue(new Callback() {
                            @Override
                            public void onResponse(Call call, Response response) {

                                HitsList hitsList = new HitsList();
                                String jsonResponse = "";
                                try{
                                    Log.d(TAG, "onResponse: server response: " + response.toString());

                                    if(response.isSuccessful()){
                                        hitsList = response.body().getHits();
                                    }else{
                                        jsonResponse = response.errorBody().string();
                                    }

                                    Log.d(TAG, "onResponse: hits: " + hitsList);

                                    for(int i = 0; i  call, Throwable t) {
                                Log.e(TAG, "onFailure: " + t.getMessage() );
                                Toast.makeText(getActivity(), "search failed", Toast.LENGTH_SHORT).show();
                            }
                        });
                    }

                    return false;
                }

例如代码呈现ff查询，该查询显示国家 US 内名称中包含 NEW 的可用城市：

_search？default_operator = AND＆q = new * country：Us

但我想要实现的是这样的：

_search？default_operator = AND＆q = new * country：Us || Canada

这应该导致在 US OR CANADA 中显示名称中包含 NEW 的所有城市 .

但是||似乎没有用，所以我要求正确的改造OR运算符，或者可以帮助我实现目标的东西 .