Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao luat cac snippets" » "dap luat cac snippets", "dan luat cac snippets", "dao luan cac snippets", "dao luat can snippets", "dao luat cau snippets", "dao xuat cac 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: (((("dao luat cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao luat cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao luat cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao luat cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.