Perhaps you should try some spelling variations:
"cong can khach snippets" » "cong van khanh snippets", "cong vay khach snippets", "cong cua khach snippets", "cong san khach snippets", "cong tan khach snippets", "cong dan khach snippets", "cong can khach slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("cong can khach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong can khach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong can khach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong can khach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.