Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc nhan le snippets" » "luc nhat le snippets", "cu nhan le snippets", "tue nhan le snippets", "luc phan le snippets", "luc nhan ve 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 nhan 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 nhan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc nhan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc nhan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.