Perhaps you should try some spelling variations:
"doan trinh tu snippets" » "doan tinh tu snippets", "dan trinh tu snippets", "doan hinh tu snippets", "doan trinh ky snippets", "doan trinh do snippets", "doan trinh tu slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("doan trinh tu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan trinh tu snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan trinh tu snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan trinh tu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.