Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung cap, dung cua
tranh ban » trinh ban, tranh hang, tranh luan
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tran ban » tran van, toan ban, tran bai

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 - hanh ((trung cua) OR (trung tuan)) nhung cong tan ((tran ban) OR (tranh ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trung cua) OR (trung tuan)) nhung cong tan ((tran ban) or (tranh ban))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trung cua) OR (trung tuan)) nhung cong tan ((tran ban) or (tranh ban))*.