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

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toan du 3 snippets") OR ("python missing data snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( toan du 3 snippets ) or ( python missing data snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("toan du 3 snippets") or ("python missing data snippets"))) or ("locating bug core snippets"))*.