Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhu cao so snippets" » "nha cao so snippets", "nhu cau so snippets", "nghe cao so snippets", "nhu cao son snippets", "nhu co so snippets", "nhu cao su 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: (((("nhu cao so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhu cao so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhu cao so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhu cao so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.