Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
ho thiet » hoc thiet, hoa thiet, so thiet
tung dap » trung dai, tuong dan, tuong dao
tung dan » dung dan, huong dan, trung dai
ung cong » dung cong, luong cong, duong cong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

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 ((tung dap) OR (tung dan)) ung cong tac than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - thanh ((tung dap) OR (tung dan)) ung cong tac than cap".
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - thanh ((tung dap) OR (tung dan)) ung cong tac than cap*.