Perhaps you should try some spelling variations:
"toc cao thue snippets" » "toc cao code snippets", "toc cho thue snippets", "toc cao thu snippets", "toc cao thien snippets", "hoc cao thue snippets", "toc dao thue snippets", "toc co thue 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 cao thue 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 cao thue snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( toc cao thue snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("toc cao thue snippets"))) or ("locating bug core snippets"))*.