Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien hach » thien thanh, hien hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hach su » hoach su, cach su, hanh su
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu
x hoi » o hoi, x ho, 5 hoi
su va » su van, tu va

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((x hoi) OR (xa hoi)). hieu thien hach su va hanh vi cua tu~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) OR (xa hoi)). hieu thien hach su va hanh vi cua tu*.