Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"cuu dan so snippets" » "cuu dan code snippets", "cuu danh so snippets", "cuu van so snippets", "cua dan so snippets", "cuu dan soc snippets", "cuu dan su snippets", "cuu dan mo snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cuu dan 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: (((("cuu dan so snippets") OR ("python missing data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cuu dan so snippets ) or ( python missing data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuu dan so snippets") or ("python missing data snippets"))) or ("locating bug core snippets"))*.