Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cuon dan dung slippers" » "cuon danh dung slippers", "cuoi dan dung slippers", "cuong danh dung slippers", "cuon van dung slippers", "cuon tin dung slippers", "cuon ap dung slippers", "cuon dan dung slippery", "cuon dan dung grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") or ("cuon dan dung slippers"))) or ("locating bug code snippets"))~.
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