Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han dan hoat snippets" » "han van hoa snippets", "han dan hoc snippets", "han danh hoa snippets", "nhan dan hoat snippets", "han danh hoat snippets", "shan dan hoat 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: (((("han dan hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han dan hoat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han dan hoat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han dan hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.