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