Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tich toan da snippets" » "tinh toan da snippets", "tich than da snippets", "trinh toan da snippets", "tich toan dam snippets", "tich toan dai snippets", "tich toan dau 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: (((("tich toan da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tich toan da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tich toan da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tich toan da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.