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