Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thue van son snippets" » "thue va son snippets", "thuc van son snippets", "thuy van son snippets", "thue van dong snippets", "thue van cong snippets", "thue van sung 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 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: (((("thue van son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thue van son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thue van son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.