Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"phan van tan snippets" » "pham van tan snippets", "thanh van tan snippets", "luan van tan snippets", "phan van tuan snippets", "phan van ban snippets", "phan van tai snippets"

Try widening your search to All Fields.

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