Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"khoa dan code snippets" » "khoa dang code snippets", "hoa dan code snippets", "khoa can code snippets", "khoa dan de snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("khoa dan code snippets") or ("using java java snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa dan code snippets") OR ("using java java snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( khoa dan code snippets ) or ( using java java snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa dan code snippets") or ("using java java snippets"))) or ("locating bug code slippers"))*.