Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghe nhan so snippets" » "nghe dan so snippets", "nghe san so snippets", "nghe nano so snippets", "nghe nhan su snippets", "nghe nhat so snippets", "nghe nhan mo 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: (((("nghe nhan 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: (((("nghe nhan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghe nhan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghe nhan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.