Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"doc hoc sinh snippets" » "duoc hoc sinh snippets", "toc hoc sinh snippets", "duc hoc sinh snippets", "doc hoc dinh snippets", "doc hoc minh snippets", "doc hoc kinh snippets", "doc hoc sinh 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 hoc sinh 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 hoc sinh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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