Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tong cot snippets" » "duc thong cot snippets", "duc trong cot snippets", "duc ton cot snippets", "duc tong cong snippets", "duc tong hop snippets", "duc dong co 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: (((("duc tong cot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc tong cot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tong cot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tong cot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.