Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"dau do cao snippets" » "cau do cao snippets", "dau co cao snippets", "dao do cao snippets", "dau o cao snippets"
"locating bug code snippets" » "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: (((("python missing data snippets") or ("dau do cao snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python missing data snippets") OR ("dau do cao snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python missing data snippets ) or ( dau do cao snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python missing data snippets") or ("dau do cao snippets"))) or ("locating bug code snippets"))*.