Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
tieu sach » chieu sach, dien sach, te sach
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dung cong » dung trong
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
tinh su » trinh su, hinh su, tinh tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh tinh su ((nhung cong) or (dung cong)) tan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh tinh su ((nhung cong) OR (dung cong)) tan ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh tinh su ((nhung cong) or (dung cong)) tan ((toan cau) or (toan ban))*.