Perhaps you should try some spelling variations:
cam truc » cau truc, lam truoc, nam truoc
nam truc » nam truoc, nam thuc, nam trung
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu ve ((cam truc) OR (nam truc)) va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ve ((cam truc) OR (nam truc)) va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve ((cam truc) OR (nam truc)) va hanh vi cua tre*.