Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham luat vo snippets" » "phap luat vo snippets", "pham luan vo snippets", "pham xuat vo snippets", "pham luat ve snippets", "pham luat so snippets", "pham luat va 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: (((("pham luat 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: (((("pham luat vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham luat vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham luat vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.