Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"han cot nhat snippets" » "han cot hat snippets", "han tot nhat snippets", "han cong nhat snippets", "han mot nhat snippets", "bang cot nhat snippets", "han cosh nhat snippets", "han cot nhat 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: (((("han cot nhat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han cot nhat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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