Perhaps you should try some spelling variations:
thanh trung » thanh tung
thep thiet » thep viet, thuyet thiet
thiet tach » chiet tach, thien hach, thuat tach
trung cua » truong cua, trung tuan, trung cap
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
hanh cac » hang cac, hanh cat, nhanh cay
hanh cad » hanh cat, hanh cap, nhanh cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: thep thiet tach - thanh trung cua tong ((cong trinh) or (cong san)) ((hanh cac) or (hanh cad))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thep thiet tach - thanh trung cua tong ((cong trinh) OR (cong san)) ((hanh cac) OR (hanh cad)).
• Adding a wildcard symbol may retrieve word variants: thep thiet tach - thanh trung cua tong ((cong trinh) or (cong san)) ((hanh cac) or (hanh cad))*.