Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"ngu duc dung snippets" » "ngu duc hung snippets", "ngu duc cuong snippets", "ngu duc phung snippets", "ngu tuc dung snippets", "ngo duc dung snippets", "ngu du dung snippets", "ngu duc dung 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 duc dung 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 duc dung snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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