Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc bao toan snippets" » "luc bai toan snippets", "luc bao ton snippets", "luc bao thang snippets", "duc bao toan snippets", "luc bat toan snippets", "luc cao 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: (((("luc bao 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: (((("luc bao toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc bao toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc bao toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.