Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khac son dan snippets" » "khach san dan snippets", "khanh son dan snippets", "thai son dan snippets", "khac so dan snippets", "khac soc dan snippets", "khac son da snippets", "khac son dan 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: (((("khac son dan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khac son dan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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