Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
van thanh » ban thanh, van tuan
ho thiet » hoc thiet, hoa thiet, so thiet
cua dung » cua dang, cua dong, qua dung
van tan » van tuan, van ban, van tien
van tai » von tai, van tuan

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 trinh cua dung cong ((((van tan) OR (van tai))) or (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - hanh trinh cua dung cong ((((van tan) OR (van tai))) OR (van thanh)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - hanh trinh cua dung cong ((((van tan) OR (van tai))) or (van thanh)) cau*".