Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung mo so snippets" » "dung mo code snippets", "dung co so snippets", "dung cho so snippets", "dung von so snippets", "dung mot so snippets", "dung mo soi snippets", "dung ma so snippets"

Try widening your search to All Fields.

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