Perhaps you should try some spelling variations:
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
trinh cua » trinh luat, trinh quan, trinh luan
ho chiet » ho chieu, ho thiet, hoc thiet
tinh cua » sinh cua, tinh chat, tranh cua
cong tan » cong tac, cong san, cong thanh
ban cau » bang cau, ban can, ban dau
van cau » van dau, van hau, van chat

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh ((trinh cua) OR (tinh cua)) thong cong tan ((ban cau) OR (van cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh ((trinh cua) or (tinh cua)) thong cong tan ((ban cau) OR (van cau))~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh ((trinh cua) or (tinh cua)) thong cong tan ((ban cau) OR (van cau))*.