Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va hanh » va thanh, va danh, ban hanh
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu va cam xuc ((va hanh) or (van hanh)) vi ((cua viet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu va cam xuc ((va hanh) OR (van hanh)) vi ((cua viet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu va cam xuc ((va hanh) or (van hanh)) vi ((cua viet) or (su triet))*.