Perhaps you should try some spelling variations:
"dung hoc tranh slippers" » "dung hoc thanh slippers", "dung hoc trinh slippers", "dung cuoc tranh slippers", "dong hoc tranh slippers", "dung thuoc tranh slippers", "trung hoc tranh slippers", "dung hoc tranh slippery", "dung hoc tranh 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: (((("dung hoc tranh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hoc tranh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hoc tranh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hoc tranh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.