Perhaps you should try some spelling variations:
"dung hoc trinh slippers" » "dung doc trinh slippers", "dung hoc tinh slippers", "dung hoc sinh slippers", "dong hoc trinh slippers", "dung thuoc trinh slippers", "trung hoc trinh slippers", "dung hoc trinh slippery", "dung hoc 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: (((("dung hoc 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: (((("dung hoc trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hoc trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hoc trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.