Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc huy khoe snippets" » "duc huy khoa snippets", "duc duy khoe snippets", "duc huy khoai snippets", "duc hue khoe snippets", "duc quy khoe 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 huy khoe 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 huy khoe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc huy khoe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc huy khoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.