Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
tran tuan » tran xuan, tran quang, tran thanh
ho chieu » theo chieu, hoc thieu, doi chieu
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, trang tai

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 ((tinh cua) OR (sinh cua)) nhung cong tan ((tran tap) OR (tran tuan))~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((tinh cua) or (sinh cua)) nhung cong tan ((tran tap) or (tran tuan))*.