Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan lam cua snippets" » "luan lap cua snippets", "quang lam cua snippets", "luan van cua snippets", "luan nam cua snippets", "luan lam chat 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 lam 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 lam cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan lam cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan lam cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.