Perhaps you should try some spelling variations:
"dai dung cong snippets" » "dai dung code snippets", "dai dung trong snippets", "dai duong cong snippets", "dan dung cong snippets", "mai dung cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java java snippets\") OR (\"dai dung cong snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using java java snippets ) OR ( dai dung cong snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") OR ("dai dung cong snippets"))) OR ("locating bug core snippets"))*.