Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lon khoa vo snippets" » "von khoa vo snippets", "con khoa vo snippets", "lo khoa vo snippets", "lon hoa vo snippets", "lon khoa co snippets", "lon khoa hoc 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: (((("lon khoa vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lon khoa vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lon khoa vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lon khoa vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.