Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"thu phan bac snippets" » "thu nhan bac snippets", "thuat phan bac snippets", "than phan bac snippets", "thu phan cac snippets", "thu phan ba snippets", "thu pham bac snippets", "thu phan bac 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: (((("thu phan bac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu phan bac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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