Perhaps you should try some spelling variations:
"trinh hanh cua snippets" » "trinh thanh cua snippets", "trinh han cua snippets", "trinh anh cua snippets", "trinh manh cua snippets", "trinh hang cua snippets", "trinh hanh sua 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 (\"trinh hanh cua snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( trinh hanh cua snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("trinh hanh cua snippets"))) OR ("locating bug code snippets"))*.