Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"duc con khoa snippets" » "duc von khoa snippets", "duc toan khoa snippets", "duc cuu khoa snippets", "duc cong khoa snippets", "duc ton khoa snippets", "duc cuong khoa snippets", "duc con khoa 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 con khoa 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 con khoa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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