Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
ho thiet » hoc thiet, hoa thiet, so thiet
cong van » cong vang, song van, cong tan
cong san » cong tac

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 quan nhung ((cong van) OR (cong san)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - hanh trinh quan nhung ((cong van) OR (cong san)) van ban".
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hanh trinh quan nhung ((cong van) OR (cong san)) van ban*.