Perhaps you should try some spelling variations:
"trinh toan duc snippets" » "tinh toan duc snippets", "thanh toan duc snippets", "trinh han duc snippets", "trinh tran duc snippets", "trinh toan du snippets", "trinh ton duc snippets", "trinh toan duc slippers"
"trong cac code snippets" » "trong cac cong snippets", "trong cac co snippets", "trong cac che snippets", "trong cac code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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 toan duc snippets\") OR (\"trong cac code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh toan duc snippets ) OR ( trong cac code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh toan duc snippets") OR ("trong cac code snippets"))) OR ("locating bug code snippets"))*.