Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc doi cao snippets" » "cuoc doi cao snippets", "duoc hoi cao snippets", "luoc doi cao snippets", "duoc do cao snippets", "duoc doi co snippets", "duoc doc cao snippets"
"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: (((("duoc doi cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc doi cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("duoc doi cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.