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