搜索分组（Search for grouping）

Use parentheses to encapsulate OR statements for the search engine to execute them properly.
使用括号来封装分组查询语句，以便搜索引擎正确执行它们。

The OR operator is executed as “I would like at least one of these terms”.
OR运算符被理解为“至少满足一个这样的条件”。

Groupings of terms are made using ( and ). Groupings of all query elements are supported in general. Groupings are also supported after a field - field group.

The query elements in field groups all apply to the same field and cannot include a field.
分组语句必须应用于同一个字段，并且分组语句中不能包含字段名。

(big OR large) AND banana  
title:((big OR large) AND banana)