Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"than du 3 snippets" » "than duc 3 snippets", "toan du 3 snippets", "han du 3 snippets", "than du _ snippets", "than do 3 snippets", "than du f snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("than du 3 snippets") or ("python missing data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("than du 3 snippets") OR ("python missing data snippets"))) OR ("locating bug core snippets"))*.
• Removing quotes may allow a broader search: (((( than du 3 snippets ) or ( python missing data snippets ))) or ( locating bug core snippets ))*.