Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trang » thanh trung, canh tranh, hanh trinh
trang cua » tranh cua, tang cua, trung cua
so thiet » soc thiet, hoc thiet, hoa thiet
ban cong » bang cong, van cong, phan cong
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

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