Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc duy tran slippers" » "duc huy tran slippers", "duc duy tan slippers", "duc duy tuan slippers", "duc quy tran slippers", "duc dung tran slippers", "duc duy tran slippery", "duc duy tran grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duc duy tran slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc duy tran slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("duc duy tran slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.