Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham huu hon snippets" » "pham duc hon snippets", "pham duy hon snippets", "phan huy hon snippets", "pham huu han snippets", "pham huu ho snippets", "pham huu son 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 huu hon 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 huu hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham huu hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham huu hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.