Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao luan ke snippets" » "dan luan ke snippets", "dao xuan ke snippets", "dat luan ke snippets", "dao luan ket snippets", "dao luat ke snippets", "dao luan ve 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: (((("dao luan ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao luan ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao luan ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao luan ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.