Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao ket doan snippets" » "dao ket hoa snippets", "dao le doan snippets", "dao ket van snippets", "cao ket doan snippets", "dao viet doan snippets", "dao kito doan 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 ket doan 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 ket doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao ket doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao ket doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.