Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
doi trinh » doc trinh, doi tinh, dong trinh
trinh tin » trinh kinh, trinh toan, trinh tu
dung cong » dung trong
tinh cua » trinh cua, sinh cua, tinh chat
cua dung » cua dang, cua dong, qua dung
cong ban » cong bang, cong san, cong tan
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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: doi trinh tin - nhanh tinh cua dung cong ban ((than cau) OR (phan cau))~.
• Adding a wildcard symbol may retrieve word variants: doi trinh tin - nhanh tinh cua dung cong ban ((than cau) or (phan cau))*.