Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"de dong va snippets" » "den dong va snippets", "di dong va snippets", "de dang va snippets", "de dung va snippets", "de dong ha snippets", "de luong va snippets"

Try widening your search to All Fields.

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