Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham luat du snippets" » "phap luat du snippets", "pham luan du snippets", "pham xuat du snippets", "pham luat dau snippets", "pham luat su snippets", "pham luat tu 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 luat du 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 luat du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham luat du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham luat du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.