Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran doan vu slippers" » "trang doan vu slippers", "tan doan vu slippers", "tran hoan vu slippers", "tran doan va slippers", "tran doan vi slippers", "tran doan tu slippers", "tran doan vu slippery", "tran doan vu 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: (((("tran doan vu slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran doan vu slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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