Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khoa van dam snippets" » "hoa van dam snippets", "khoa can dam snippets", "khoa luan dam snippets", "khoa van nam snippets", "khoa van dao snippets", "khoa van dau snippets", "khoa van dam 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: (((("khoa van dam snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa van dam snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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