Perhaps you should try some spelling variations:
"cuon sach dat slippers" » "duong sach dat slippers", "cuoc cach dat slippers", "co sach dat slippers", "cuon sach dao slippers", "cuon sach danh slippers", "cuon sach bai slippers", "cuon sach dat slippery", "cuon sach dat 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: (((("cuon sach dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuon sach dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuon sach dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuon sach dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.