Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
thiet tach » chiet tach, thien hach, thuat tach
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua trung » cua truong, xuan trung, cua nhung
danh toan » manh toan, anh toan, dang toan
ho thiet » hoc thiet, hoa thiet, so thiet
tinh cua » trinh cua, sinh cua, tinh chat
dan toan » van toan, dan than, manh toan

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 - hanh tinh cua trung cong ((danh toan) OR (dan toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - hanh tinh cua trung cong ((danh toan) OR (dan toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hanh tinh cua trung cong ((danh toan) OR (dan toan)) cau*.