Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc trung ca snippets" » "dac trung ca snippets", "dung trung ca snippets", "do trung ca snippets", "duc trung cap snippets", "duc truong ca snippets", "duc trung 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: (((("duc trung ca 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 trung ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc trung ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc trung ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.