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