Perhaps you should try some spelling variations:
"doan tuan trinh slippers" » "doan xuan trinh slippers", "doan thanh trinh slippers", "doan thuat trinh slippers", "doan quan trinh slippers", "doanh luan trinh slippers", "doan quang trinh slippers", "doan tuan trinh slippery", "doan tuan trinh grippers"
"dung java java snippets" » "dung va java 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: (((("doan tuan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan tuan trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan tuan trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan tuan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.