Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"doc hoa sach snippets" » "doc khoa sach snippets", "doc hoc sach snippets", "doc hoi sach snippets", "do hoa sach snippets", "hoc hoa sach snippets", "duc hoa sach snippets", "doc 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: (((("doc 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: (((("doc hoa sach snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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