Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"luc duc con snippets" » "luc duc code snippets", "luc du con snippets", "luu duc con snippets", "luc dich con snippets", "luc duc cong snippets", "luc duc ton snippets", "luc duc cuong 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: (((("luc duc con snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luc duc con snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luc duc con snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc duc con snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.