Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham ngu doc snippets" » "pham ngua doc snippets", "phap ngu doc snippets", "pham ngoc doc snippets", "pham ngu hoc snippets", "pham ngo doc snippets", "pham ngu coc 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 ngu doc 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 ngu doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham ngu doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham ngu doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.