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