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"
"dan tu va snippets" » "danh tu va snippets", "dan su va snippets", "ban tu va snippets", "dan tu va slippers"

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