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"
"phan dau van snippets" » "phan tu van snippets", "hang dau van snippets", "phan dao van snippets", "phan dam van snippets", "phan dau va snippets"

Try widening your search to All Fields.

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