Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"nhan hoc mes snippets" » "nha hoc mes snippets", "nhan hoa mes snippets", "than hoc mes snippets", "nhan hoc smes snippets", "nhan hoc mems snippets", "nhan hoc mesh snippets", "nhan hoc mes 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: (((("nhan hoc mes snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan hoc mes snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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