Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan va hanh slippers" » "doan van hanh slippers", "doan va thanh slippers", "doan va danh slippers", "doanh va hanh slippers", "dan va hanh slippers", "toan va hanh slippers", "doan va hanh slippery", "doan va hanh grippers"
"locating bug code snippets" » "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: (((("doan va hanh slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan va hanh slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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