Perhaps you should try some spelling variations:
nguoi san » nguoi tay, nguoi dao, nguoi ma
san hanh » san thanh, ban hanh, van hanh
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
ve cai » va cai, ve cac, ve tai
vi cua » vai cua, di cua
su sac » su sach, su xac
ma hoi » mai hoi, xa hoi, ma hoa
su cac » tu cac, su cao, su can
ve cap » ve cac, le cap, ve cau

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 cac)) ky nang ma hoi. hieu ((ve cap) OR (ve cai)) nguoi san hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su cac)) ky nang ma hoi. hieu ((ve cap) OR (ve cai)) nguoi san hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su cac)) ky nang ma hoi. hieu ((ve cap) OR (ve cai)) nguoi san hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su cac)) ky nang ma hoi. hieu ((ve cap) OR (ve cai)) nguoi san hanh vi cua tre*.