Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tu quynh don snippets" » "tu quy don snippets", "tu quynh hoa snippets", "tu quynh lan snippets", "thu quynh don snippets", "thuy quynh don snippets", "truc quynh don 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: (((("tu quynh don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tu quynh don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tu quynh don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tu quynh don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.