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