Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lua rai toan snippets" » "lua bai toan snippets", "lua tap toan snippets", "lua van toan snippets", "lua lai toan snippets", "luat dai toan snippets", "luan rui 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 rai 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 rai toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lua rai toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lua rai toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.