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