Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hai chat snippets" » "duc hai chau snippets", "duc phap chat snippets", "duc chai chet snippets", "cuc hai chat snippets", "duc dai chat snippets", "duc hau chat 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 hai chat 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 hai chat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hai chat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hai chat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.