Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"doi hoa sach snippets" » "doi khoa sach snippets", "doi hoc sach snippets", "doi hoi sach snippets", "doi hoac sach snippets", "doi hoat sach snippets", "do hoa sach snippets", "doi hoa sach 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: (((("doi hoa sach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi hoa sach snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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