Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
khoan cam » khoa cam, khoan va, phan cam
cong san » cong tac
khan cap » khan ap, than cap, phan cac
ho cuu » ho chu, ho cua, so cuu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho cuu) OR (_ nuu)) tinh - thanh trung cua thong cong san ((khan cap) OR (khoan cam))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho cuu) or (_ nuu)) tinh - thanh trung cua thong cong san ((khan cap) OR (khoan cam))~".
• Adding a wildcard symbol may retrieve word variants: ((ho cuu) or (_ nuu)) tinh - thanh trung cua thong cong san ((khan cap) OR (khoan cam))*.