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