Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan hoat den snippets" » "van hoa den snippets", "dan hoc den snippets", "danh hoa den snippets", "dan hoat dong snippets", "dan hoat doi snippets", "dan hoat van 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: (((("dan hoat 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: (((("dan hoat den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan hoat den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan hoat den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.