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