Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
cac toc » cac toi, cac nuoc, cac thoi
ta hanh » ta thanh, va hanh, da hanh
tu hanh » du hanh, lu hanh, thuc hanh
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su xac
su cac » tu cac, su cao, su can
va cua » va chua, via cua, ca cua

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 xa hoi. lieu va cac toc ((ta hanh) OR (tu hanh)) va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su cac)) ky nang xa hoi. lieu va cac toc ((ta hanh) OR (tu hanh)) va cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su cac)) ky nang xa hoi. lieu va cac toc ((ta hanh) OR (tu hanh)) va cua tre*.