Perhaps you should try some spelling variations:
lam truoc » lam thuoc, lam truong, nam thuoc
nam truoc » nam thuoc, nam truc, nam truong
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
dinh vi » dinh ve, dinh viet, dinh tri
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu van ((nam truoc) or (lam truoc)) va dinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van ((nam truoc) OR (lam truoc)) va dinh vi cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van ((nam truoc) or (lam truoc)) va dinh vi cua te*.