Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc luat chu snippets" » "duoc luat chu snippets", "duc duat chu snippets", "dung luat chu snippets", "duc luat thu snippets", "duc luat cau snippets", "duc luat cho 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 luat chu 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 luat chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc luat chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc luat chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.