Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"dao cuu sinh snippets" » "dao cuu tinh snippets", "dao cua sinh snippets", "dao cho sinh snippets", "dao huu sinh snippets", "dao cau sinh snippets", "dao chu sinh snippets", "dao cuu 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: (((("dao cuu 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: (((("dao cuu sinh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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