Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"dang su ha snippets" » "dang su hai snippets", "dang su nha snippets", "dang su han snippets", "dan su ha snippets", "dung su ha snippets", "dong su ha snippets"

Try widening your search to All Fields.

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