Perhaps you should try some spelling variations:
thanh tinh » thanh binh, nhanh tinh, than kinh
nhung cong » thong cong, hang cong, nhung don
tieu sach » chieu sach, dien sach, te sach
dung cong » dung trong
tinh cua » trinh cua, sinh cua, tinh chat
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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: theo tieu sach - thanh tinh cua ((((nhung cong) OR (dung cong))) OR (han tong)) dan toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh tinh cua ((((nhung cong) or (dung cong))) or (han tong)) dan toan cau*.