Perhaps you should try some spelling variations:
"quang trinh mo snippets" » "quang thinh mo snippets", "quang ninh mo snippets", "quang binh mo snippets", "quang trinh do snippets", "quang trinh co snippets", "quang trinh hoa snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: "((((\"dung java java snippets\") OR (\"quang trinh mo snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( quang trinh mo snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("quang trinh mo snippets"))) OR ("locating bug code snippets"))*.