Perhaps you should try some spelling variations:
"pham hoa code snippets" » "pham hoa co snippets", "pham hoa cong snippets", "pham khoa code snippets", "phan hoa code snippets", "pham hoang code snippets", "pham hoa code slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("python using a snippets") or ("pham hoa code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using a snippets") OR ("pham hoa code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using a snippets ) or ( pham hoa code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using a snippets") or ("pham hoa code snippets"))) or ("locating bug code snippets"))*.