Perhaps you should try some spelling variations:
"dang nghe trinh slippers" » "dang nghe tinh slippers", "dang nghe sinh slippers", "dang nghe trong slippers", "lang nghe trinh slippers", "nang nghe trinh slippers", "cong nghe trinh slippers", "dang nghe trinh slippery", "dang nghe 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: (((("dang nghe 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: (((("dang nghe trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang nghe trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang nghe trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.