Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
cam truc » cau truc, nam truc, nam truoc
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
ca viet » va viet, co viet, hoa viet
su sac » su sach, su xac
su cac » tu cac, su cao, su can
x hoi » xa hoi, o hoi, x ho
vi ca » vit ca, li ca, va ca

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: ((su sac) OR (su cac)) ky nang x hoi. hieu ve ((cam truc) OR (lam truoc)) van hanh vi ca viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su cac)) ky nang x hoi. hieu ve ((cam truc) or (lam truoc)) van hanh vi ca viet~".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su cac)) ky nang x hoi. hieu ve ((cam truc) or (lam truoc)) van hanh vi ca viet*.