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