Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khai toan co snippets" » "khai tuan co snippets", "khai hoan co snippets", "khi toan co snippets", "khai toan cao snippets", "khai toan ho snippets", "khai toan hoc 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: (((("khai toan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khai toan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khai toan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khai toan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.