Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan ben cua snippets" » "luan ban cua snippets", "luan den cua snippets", "luan len cua snippets", "luan benh cua snippets", "luan bien 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: (((("luan ben 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: (((("luan ben cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan ben cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan ben cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.