Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham le chan snippets" » "phan le chan snippets", "pham lan chan snippets", "pham le thanh snippets", "pham le khanh snippets", "pham le thang 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 le chan 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 le chan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham le chan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham le chan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.