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