Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khoa va gian snippets" » "khoan va gian snippets", "khoa ma gian snippets", "hoa va gian snippets", "khoa va gianh snippets", "khoa van gian snippets", "khoa va giai snippets", "khoa va gian 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 va gian 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 va gian snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("khoa va gian snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.