Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham tang do snippets" » "pham thang do snippets", "phap tang do snippets", "pham hang do snippets", "pham trang do snippets", "pham dang do snippets", "pham tang o 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 tang do 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 tang do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham tang do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham tang do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.