Perhaps you should try some spelling variations:
chiet tach » chieu sach
doi chiet » doi chieu, doi chi, doi viet
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tong cong » cong cong, dung cong, dang cong
tinh cua » trinh cua, sinh cua, tinh chat
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh tinh cua ((tong cong) or (trong cong)) tan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh tinh cua ((tong cong) OR (trong cong)) tan ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh tinh cua ((tong cong) or (trong cong)) tan ((toan cau) or (toan cao))*.