Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"duc duy linh snippets" » "duc duy vinh snippets", "duc dua linh snippets", "duc duy binh snippets", "duc huy linh snippets", "duc quy linh snippets", "duc dung linh snippets", "duc duy linh 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 linh 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 linh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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