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