Perhaps you should try some spelling variations:
"doanh cho trinh slippers" » "danh cho trinh slippers", "doanh co trinh slippers", "doanh cao trinh slippers", "doanh tho trinh slippers", "doanh cho sinh slippers", "doanh cho trinh slippery", "doanh cho 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: (((("doanh cho 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: (((("doanh cho trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doanh cho trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doanh cho trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.