Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu cao hon snippets" » "ngu ca hon snippets", "ngu cac hon snippets", "ngu cau hon snippets", "ngu cao son snippets", "ngu cao 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: (((("ngu cao 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: (((("ngu cao hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu cao hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu cao hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.