Perhaps you should try some spelling variations:
"trinh giang doc snippets" » "trinh giao doc snippets", "trinh giai doc snippets", "trinh tieng doc snippets", "trinh gian doc snippets", "trinh giang day snippets", "trinh nang doc snippets"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug core snippets"
"locating bug 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: "((((\"trinh giang doc snippets\") OR (\"dung bug code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh giang doc snippets ) OR ( dung bug code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh giang doc snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets"))*.