Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"cot van pham snippets" » "cot san pham snippets", "cot van phan snippets", "cot van phat snippets", "cat van pham snippets", "cot va pham snippets", "cuoi van pham snippets", "cot van pham 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: (((("cot van pham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cot van pham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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