Perhaps you should try some spelling variations:
"cong cua cham snippets" » "cong cua code snippets", "cong cu cham snippets", "dong cua cham snippets", "huong cua cham snippets", "cong cua cha snippets", "cong qua cham snippets", "cong ca cham snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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 cua cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong cua cham snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong cua cham snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cua cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.