Search engine looks very simple: users enter a query keywords, the search engine in accordance with key words to the database to find, and return to the WEB page of the most suitable connection.

搜索引擎看起来很简单：用户输入一个查询关键词，搜索引擎就按照关键词语到数据库去查找，并返回最合适的WE B页连接。

youdao

These spammers send e-mails directing users to a particular search engine where they are told to enter specific key words.

CNN: Next wave of attacks against spammers underway