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