Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"han tinh duc snippets" » "hanh tinh duc snippets", "nhan tinh duc snippets", "ha tinh duc snippets", "han minh duc snippets", "han dinh duc snippets", "han ninh duc snippets", "han tinh duc 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: (((("han tinh duc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han tinh duc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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