Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam van cac snippets" » "dao van cac snippets", "nam van cac snippets", "pham van cac snippets", "dam van hac snippets", "dam van cau snippets", "dam van bac 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: (((("dam van 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: (((("dam van cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam van cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam van cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.