Perhaps you should try some spelling variations:
"trinh nhan doc snippets" » "trinh han doc snippets", "trinh phan doc snippets", "trinh nha doc snippets", "trinh nhan duoc snippets", "trinh nhanh doc snippets", "trinh than 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 nhan doc snippets\") OR (\"dung bug code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh nhan doc snippets ) OR ( dung bug code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh nhan doc snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets"))*.