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