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