Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luat van don snippets" » "luan van don snippets", "luat dan don snippets", "luat va don snippets", "luat van dong snippets", "luat van doan snippets", "luat 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: (((("luat 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: (((("luat van don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luat van don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luat van don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.