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