How to know if a bug has been reported before?

[rhe <rhe redhat com>]

Greeting guys,

Hi, when a bug is found, is there any way to check out if this bug has been reported or not? I did it just by searching the key words in bugzilla. But I think there may be other ways better than that. do you have any idea to share with me?

Thanks,
Rui He

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