Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khi doi nhan snippets" » "khi doi khang snippets", "khi tri nhan snippets", "khi hoi nhap snippets", "khi dai nhan snippets", "khi hoi nhan snippets", "khi moi nhan snippets", "khi doi nhan 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: (((("khi doi nhan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi doi nhan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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