Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngon xu cau snippets" » "ngon tu cau snippets", "ngon ngu cau snippets", "ngan xua cau snippets", "ngon cu cau snippets", "ngon su cau 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: (((("ngon xu cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngon xu cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngon xu cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngon xu cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.