Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sieu van don snippets" » "hieu van don snippets", "su van don snippets", "lieu va don snippets", "sieu van dong snippets", "sieu van doan snippets", "sieu van dan 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: (((("sieu van don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sieu van don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sieu van don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sieu van don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.