Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
cong thanh » dong thanh, cong trinh, cong tan
thanh than » thanh thanh, thanh thang, thanh toan
tong quan » thong quan, tong luan, luong quan
dang cong » dung cong
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - thanh ((trung tuan) or (tong quan)) dang cong thanh than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh ((trung tuan) OR (tong quan)) dang cong thanh than cau.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh ((trung tuan) or (tong quan)) dang cong thanh than cau*.