Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
thiet tach » chiet tach, thuat tach
thien hach » hien hanh
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thiet tach) or (((thien hach) OR (thien thanh)))) - thanh trung cua thong cong toan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (((thien hach) OR (thien thanh)))) - thanh trung cua thong cong toan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) or (((thien hach) OR (thien thanh)))) - thanh trung cua thong cong toan phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) or (((thien hach) OR (thien thanh)))) - thanh trung cua thong cong toan phan cau*.