Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa dap xe snippets" » "khoa tap xe snippets", "khoa cap xe snippets", "khoa dang xe snippets", "khoa dap ve snippets", "khoa rap xe 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: (((("khoa dap xe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa dap xe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa dap xe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa dap xe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.