Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"duc duy anh snippets" » "duc huy anh snippets", "duc quy anh snippets", "duc dung anh snippets", "duc duc anh snippets", "duc duy khanh snippets", "duc thuy anh snippets", "duc duy anh slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("duc duy anh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc duy anh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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