Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"anh van toan snippets" » "anh van code snippets", "anh van tuan snippets", "anh van tan snippets", "anh van thanh snippets", "anh va toan snippets", "thanh van toan snippets", "doanh van 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: (((("anh van toan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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