Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doi duc toan snippets" » "doi duc code snippets", "doi duc tan snippets", "doi duc ton snippets", "doi duc hoan snippets", "do duc toan snippets", "doi duy toan snippets", "oi duc toan 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: (((("doi duc toan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi duc toan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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