Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
hoach du » hoach su, hoach de, hoach do
hach du » khach deu, thach duc, sach dau
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 sac ky nang x hoi. hieu thien ((hach du) OR (hoach du)) va hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. hieu thien ((hach du) OR (hoach du)) va hanh vi cua te*.