Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets", "python missing data slippers"
"thi dan 31 snippets" » "thi doan 31 snippets", "thi lan 31 snippets", "thi dai 31 snippets", "thi den 31 snippets", "thi dan 31 slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("thi dan 31 snippets") or ("python missing data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi dan 31 snippets") OR ("python missing data snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi dan 31 snippets ) or ( python missing data snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi dan 31 snippets") or ("python missing data snippets"))) or ("locating bug code snippets"))*.