Perhaps you should try some spelling variations:
te sach » toc sach
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
vi cua » vai cua, di 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: ((te sach) OR (hoc cac)) ky nang xa hoi. hieu ((ve cam) OR (ve cac)) duc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (hoc cac)) ky nang xa hoi. hieu ((ve cam) OR (ve cac)) duc va hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc cac)) ky nang xa hoi. hieu ((ve cam) OR (ve cac)) duc va hanh vi cua tre*.