Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc vinh le snippets" » "duc vinh le snippets", "luc binh le snippets", "quoc vinh le snippets", "luc dinh le snippets", "luc vinh v.le snippets", "luc thinh le 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 vinh le 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 vinh le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc vinh le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc vinh le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.