Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ket chu cua snippets" » "ket cau cua snippets", "kem chu cua snippets", "ket thuc cua snippets", "ket chuc cua snippets", "ket hu cua snippets", "ket chi 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: (((("ket chu 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: (((("ket chu cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ket chu cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ket chu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.