Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lua van toan snippets" » "lua van tuan snippets", "lua van tan snippets", "lua van thanh snippets", "luan van toan snippets", "luu van toan snippets", "qua van toan 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: (((("lua van toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lua van toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lua van toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lua van toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.