Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - hanh ((tang cua) or (trung tuan)) thong cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((tang cua) OR (trung tuan)) thong cong tan tran tap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((tang cua) or (trung tuan)) thong cong tan tran tap*.