Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
lam truoc » lam thuoc, nam truoc, lam truong
hieu van » hieu va, thien van, lieu va
cam truc » cau truc, nam truc, nam truoc
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
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: thuat sach ky nang xa hoi. hieu van ((cam truc) or (lam truoc)) ((va danh) or (va dinh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. hieu van ((cam truc) OR (lam truoc)) ((va danh) OR (va dinh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. hieu van ((cam truc) or (lam truoc)) ((va danh) or (va dinh)) vi cua tre*.