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