Perhaps you should try some spelling variations:
"trinh cach su slippers" » "tinh cach su slippers", "trinh cac su slippers", "trinh mach su slippers", "trinh cach tu slippers", "trinh hoach su slippers", "trinh cach su slippery", "trinh cach su 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 cach su 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 cach su slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trinh cach su slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trinh cach su slippers"))) or ("locating bug code snippets"))*.