Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat con cu snippets" » "nhan con cu snippets", "nhat co cu snippets", "nhap cong cu snippets", "nhat cong cu snippets", "nhat con cua snippets", "nhat con tu 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 con cu 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 con cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat con cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat con cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.