Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"anh nhan nui snippets" » "danh nhan nui snippets", "doanh nhan nui snippets", "thanh nhan nui snippets", "anh than nui snippets", "anh nhan nguoi snippets", "anh chan nuoi snippets", "anh nhan nui 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: (((("anh nhan nui snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("anh nhan nui snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh nhan nui snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh nhan nui snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.