Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien danh » thien danh, hien nhanh, hien khanh
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong tan » cong tac, cong san, cong thanh
song van » hoang van, trong van, duong van
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien danh) or (hien hanh)) - thanh trung cua thong ((cong tan) or (song van)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien danh) OR (hien hanh)) - thanh trung cua thong ((cong tan) OR (song van)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien danh) or (hien hanh)) - thanh trung cua thong ((cong tan) or (song van)) than cau*.