Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong san » cong tac
than cau » than cap, thanh chau, thanh mau
phan cau » phan dau, phan cac, phan tu
toan cau » 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 - thanh trung cua nhung cong san ((((than cau) OR (phan cau))) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh trung cua nhung cong san ((((than cau) OR (phan cau))) OR (toan cau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh trung cua nhung cong san ((((than cau) OR (phan cau))) or (toan cau))*".