Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ve triet » va trien
su triet » su viet, su tien
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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

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