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

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

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