Perhaps you should try some spelling variations:
"trinh thi cham snippets" » "trinh tai cham snippets", "trinh thiet cham snippets", "trinh tu cham snippets", "trinh thi hai snippets", "trinh toc cham snippets", "trinh thi ha snippets"
"trong cac code snippets" » "trong cac cong snippets", "trong cac co snippets", "trong cac che snippets"
"locating bug code snippets" » "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 thi cham snippets\") OR (\"trong cac code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh thi cham snippets ) OR ( trong cac code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh thi cham snippets") OR ("trong cac code snippets"))) OR ("locating bug code snippets"))*.