Perhaps you should try some spelling variations:
"trinh toan tap snippets" » "tinh toan tap snippets", "thanh toan tap snippets", "trinh han tap snippets", "trinh toan ban snippets", "trinh toan tap slippers"
"dung va java snippets" » "dung java java snippets", "dung va java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: "((((\"trinh toan tap snippets\") OR (\"dung va java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh toan tap snippets ) OR ( dung va java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh toan tap snippets") OR ("dung va java snippets"))) OR ("locating bug code snippets"))*.