Perhaps you should try some spelling variations:
cai nguoi » ca nguoi, coi nguoi, cuoi nguoi
nguoi san » nguoi tay, nguoi dao, nguoi ma
san hanh » san thanh, ban hanh, van hanh
dua tren » dung tren
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
su sac » su sach, su xac
su cac » tu cac, su cao, su can
ve cai » va cai, ve cac, ve tai

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 cao hoi. hieu ve cai nguoi san hanh vi ((dua tren) OR (cuu tre))~.
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su cac)) ky nang cao hoi. hieu ve cai nguoi san hanh vi ((dua tren) or (cuu tre))*.