Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham dat cao snippets" » "pham dac cao snippets", "pham dau cao snippets", "pham nhat cao snippets", "pham dat cau snippets", "pham dam cao snippets", "pham dao cao 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 dat cao 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 dat cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham dat cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham dat cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.