Perhaps you should try some spelling variations:
nguoi san » nguoi tay, nguoi dao, nguoi ma
tai nguoi » tay nguoi, tac nguoi, loai nguoi
san hanh » san thanh, ban hanh, van hanh
cua tre » cuu tre, cua triet, dua tren
hanh di » hanh vi, hanh de, hang di
nang xa » nang x, lang xa, nang ma
hieu de » hieu ve, hieu he, hieu le
su sac » su sach, su cac
de tai » de thi, te tai
su xac » pu xac, su cac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su xac)) ky nang xa hoi. hieu de tai nguoi san hanh di ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky nang xa hoi. hieu de tai nguoi san hanh di ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su xac)) ky nang xa hoi. hieu de tai nguoi san hanh di ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su xac)) ky nang xa hoi. hieu de tai nguoi san hanh di ((cua tre) or (cua te))*.