Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"thuc tu 05 snippets" » "thuoc tu 05 snippets", "thuc te 05 snippets", "thu tu 05 snippets", "thuc tu 01 snippets", "thuc tu 07 snippets", "thuc tu 08 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: (((("thuc tu 05 snippets") or ("python missing data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuc tu 05 snippets") OR ("python missing data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( thuc tu 05 snippets ) or ( python missing data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuc tu 05 snippets") or ("python missing data snippets"))) or ("locating bug core snippets"))*.