Perhaps you should try some spelling variations:
"quang tran co snippets" » "quang tuan co snippets", "quang trung co snippets", "quang thanh co snippets", "quang tranh co snippets", "quang toan co snippets", "quang tran cong 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: "((((\"quang tran co snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( quang tran co snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("quang tran co snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.