Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh mang » nhanh mang, hanh trang, nhanh lang
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((hanh mang) or (hanh trinh)) cua dung ((cong tan) or (huong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh mang) OR (hanh trinh)) cua dung ((cong tan) OR (huong dan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh mang) or (hanh trinh)) cua dung ((cong tan) or (huong dan)) toan cao*.