Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tranh ban » trinh ban, tranh hang, tranh luan
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
tang cua » mang cua, hang cua, tang luan
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.

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