Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan van cau snippets" » "pham van cau snippets", "thanh van cau snippets", "luan van cau snippets", "phan van dau snippets", "phan van hau snippets", "phan van chat 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: (((("phan van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.