Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
trung dap » trung cap, trung dam, trung lap
trung dai » truong dai, truong dao, trung tam
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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 chieu sach - thanh ((trung dap) OR (trung dai)) thong cong san ((than cap) OR (khan cap))~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung dap) or (trung dai)) thong cong san ((than cap) or (khan cap))*.