Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham than vo snippets" » "pham thanh vo snippets", "pham thang vo snippets", "pham tuan vo snippets", "pham than va snippets", "pham than doc snippets", "pham than hoc 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 than 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 than vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham than vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham than vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.