Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
thong dong » thong duong, thuong dong, thong cong
dong doanh » dung doanh, trong doanh, doanh doanh
doanh phan » doanh nhan, doan phan, doanh thanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
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 - thanh ((trung cua) or (trung cap)) thong dong doanh phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh ((trung cua) OR (trung cap)) thong dong doanh phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh ((trung cua) or (trung cap)) thong dong doanh phan cau*.