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
tinh cua » trinh cua, sinh cua, tinh chat
cua dung » cua dang, cua dong, qua dung
cong van » cong vang, song van, cong tan
cong san » cong tac
phan cau » phan dau, phan cac, phan lap

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 dung ((cong van) or (cong san)) ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh tinh cua dung ((cong van) OR (cong san)) ((phan cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh tinh cua dung ((cong van) or (cong san)) ((phan cau) or (phan tu))*.