Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trung cua » truong cua, trung tuan, thong cua
trung cap » truong cao, trung tam
dung cong » dung trong
ho thiet » hoc thiet, hoa thiet, so thiet
dung cua » dung luan, dung cho
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho thiet tach - thanh ((((trung cua) or (dung cua))) or (trung cap)) dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - thanh ((((trung cua) OR (dung cua))) OR (trung cap)) dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - thanh ((((trung cua) or (dung cua))) or (trung cap)) dung cong tac toan cau*.