Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doanh cho he snippets" » "danh cho he snippets", "doanh co he snippets", "doanh cao he snippets", "doanh cho thue 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: (((("doanh cho he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doanh cho he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doanh cho he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doanh cho he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.