Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi loai den snippets" » "phi loi den snippets", "phan loai den snippets", "phap loai den snippets", "phi loai tren snippets", "phi loai bien snippets", "phi loai danh 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: (((("phi loai den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi loai den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi loai den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi loai den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.