Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoan ke du snippets" » "khoan le du snippets", "khoan va du snippets", "toan ke du snippets", "khoan ke dau snippets", "khoan ket du snippets", "khoan te du 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: (((("khoan ke du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoan ke du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoan ke du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoan ke du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.