Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat nhan cua snippets" » "hat nhan cua snippets", "dac nhan cua snippets", "sat nhan cua snippets", "dat nhat cua snippets", "dat nhan luc snippets", "dat nhan su 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 nhan 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 nhan cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat nhan cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat nhan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.