Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"
"dam van tuan snippets" » "dam van quan snippets", "dam van ban snippets", "dam anh tuan snippets", "dao van tuan snippets", "nam van tuan snippets", "pham van tuan snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dam van tuan snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dam van tuan snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
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