Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"ngu chu duc snippets" » "ngu cu duc snippets", "ngu cau duc snippets", "ngu phu duc snippets", "ngu thu duc snippets", "ngu chua duoc snippets", "ngu cuu duoc snippets", "ngu chu 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: (((("ngu chu 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: (((("ngu chu duc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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