Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan anh hoc snippets" » "dan anh code snippets", "dan canh hoc snippets", "dan hanh hoc snippets", "van anh hoc snippets", "dan sinh hoc snippets", "dan benh hoc snippets", "dan hinh hoc snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dan anh hoc snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
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