Perhaps you should try some spelling variations:
"dai duong code snippets" » "dai duong co snippets", "dai duong cong snippets", "dai duong che snippets", "dai cuong code snippets", "hai duong code snippets", "dai luong code snippets"
"locating bug core snippets" » "locating bug code snippets"
"using a java snippets" » "using _ 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 a java snippets\") OR (\"dai duong code snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using a java snippets ) OR ( dai duong code snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using a java snippets") OR ("dai duong code snippets"))) OR ("locating bug core snippets"))*.