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