Perhaps you should try some spelling variations:
"dong tham nhap slippers" » "dong tam nhap slippers", "hong tham nhap slippers", "dong thap nhap slippers", "dong tham khao slippers", "dong thu nhap slippers", "dong pham nhat slippers", "dong tham nhap slippery", "dong tham nhap 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 tham nhap 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 tham nhap slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tham nhap slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tham nhap slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.