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