Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan dan so snippets" » "phan dang so snippets", "phan dau so snippets", "nhan dan so snippets", "phan dan soc snippets", "phan dan su snippets", "phan dan mo 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 dan so 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 dan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan dan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan dan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.