Advanced search has the added benefit of matching different word forms, such as plurals, alternate verb endings, and various grammatical tenses, in the search results.
高级搜索的另一个好处就是可以在搜索结果中匹配不同单词形式，比如复数、不同的动词结尾和各种语法时态。
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Complex maximum matching: Pick the first word from the chunk with maximum length. If there are more than one chunks with maximum length, apply the next rule.