Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan doi son snippets" » "quan doi son snippets", "lua doi son snippets", "luan gioi son snippets", "luan doi song snippets", "luan dai son snippets", "luan do son 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: (((("luan doi son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan doi son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan doi son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan doi son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.