Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc khoi de snippets" » "buoc khoi de snippets", "cuoc khoi de snippets", "phuc khoi de snippets", "luc khi de snippets", "luc khoa de snippets", "luc khoi he 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 khoi de 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 khoi de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc khoi de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc khoi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.