Perhaps you should try some spelling variations:
tang luan » dung luan
dang cong » dung cong
ho chiet » ho chieu, hoc thiet, hoa thiet
ho thiet » hoc thiet, hoa thiet, so thiet
tang cua » mang cua, hang cua, thong cua
cong ban » cong bang, cong san, cong tan
ban khai » ban khi, ban thai, dan khai
khai cac » khai thac, thoai cac, tai cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chiet) OR (ho thiet)) tach - hanh ((tang cua) or (tang luan)) dang cong ban khai cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho thiet)) tach - hanh ((tang cua) OR (tang luan)) dang cong ban khai cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (ho thiet)) tach - hanh ((tang cua) or (tang luan)) dang cong ban khai cac".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) OR (ho thiet)) tach - hanh ((tang cua) or (tang luan)) dang cong ban khai cac*.