Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"nan van hau snippets" » "nhan van hau snippets", "ngan van hau snippets", "nang van hau snippets", "nan van ha snippets", "nan van hai snippets", "nan van dau snippets", "nan van hau 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: (((("nan van hau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nan van hau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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