Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan tu cham snippets" » "doan thu cham snippets", "dan tu cham snippets", "toan tu cham snippets", "doan toc cham snippets", "doan thi cham 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: (((("doan tu cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan tu cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan tu cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan tu cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.