Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"2017 cao hon snippets" » "2017 cua hon snippets", "2007 cam hon snippets", "2007 cap hon snippets", "2017 cao son snippets", "2017 cao hoc snippets", "2017 ca hon 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: (((("2017 cao hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("2017 cao hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( 2017 cao hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("2017 cao hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.