Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"muc pham voi snippets" » "duc pham voi snippets", "thuc pham voi snippets", "duoc pham voi snippets", "muc pham vi snippets", "muc cham voi snippets", "muc pham doi 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: (((("muc pham voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("muc pham voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( muc pham voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("muc pham voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.