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