Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"quang khai lua snippets" » "quang hoi lua snippets", "quan hai lua snippets", "quang ngai lua snippets", "quang khai luan snippets", "quang khau luan snippets", "quang khai quat snippets"
"locating bug core snippets" » "locating bug code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java code snippets") or ("quang khai lua snippets"))) or ("locating bug core snippets"))~.
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