Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tang cua snippets" » "duc thang cua snippets", "duc tan cua snippets", "tuc tang cua snippets", "duc mang cua snippets", "duc hang cua snippets", "duc tang luan 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: (((("duc tang 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: (((("duc tang cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tang cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tang cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.