Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hoc toan cao snippets" » "hoc toan code snippets", "hoc tan cao snippets", "hop toan cao snippets", "hoa toan cao snippets", "hoc toan ban snippets", "hoc toan tap 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: (((("hoc toan cao snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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