Perhaps you should try some spelling variations:
"duoc ca cach snippets" » "duoc ca code snippets", "duoc cac cach snippets", "duoc ma cach snippets", "duoc va cach snippets", "duoc cai cach snippets", "duoc ca cac snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc ca cach snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( duoc ca cach snippets ) or ( dung java java snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("duoc ca cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.