Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thue van soa snippets" » "thue va soa snippets", "thuc van soa snippets", "thuy van soa snippets", "thue van hoa snippets", "thue van son snippets", "thue van khoa 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: (((("thue van soa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thue van soa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thue van soa snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thue van soa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.