Perhaps you should try some spelling variations:
gap nguoi » gian nguoi, tay nguoi, lam nguoi
dao nguoi » cho nguoi
san hanh » san thanh, ban hanh, van hanh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
su can » su van, su cao, tu can
di cua » dai cua, doi cua, de cua
su sac » su sach, su cac, su xac

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