Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, dia danh
so viet » hoc viet
va hanh » van hanh, va thanh, ban hanh
hieu vu » hieu va, hieu ve, hieu su
nang xa » nang x, lang xa, nang ma
vu cam » vu cham, vu cao, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. hieu vu cam xuc ((va hanh) or (va danh)) vi ((su viet) or (so viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu vu cam xuc ((va hanh) OR (va danh)) vi ((su viet) OR (so viet)).
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu vu cam xuc ((va hanh) or (va danh)) vi ((su viet) or (so viet))*.