Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan so cao snippets" » "dan so code snippets", "dan soc cao snippets", "dan su cao snippets", "dan mo cao snippets", "dan so cap snippets", "dan o cao snippets", "dan do cao snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dan so cao snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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