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