Perhaps you should try some spelling variations:
dich viet » dinh viet, lich viet, tich viet
toc sach » hoc sach, doc sach, thuoc sach
su triet » su tien, ve triet
sach ky » sac ky, sach y, sach ty
cao hoi » co hoi, cao hoc, tao hoi
xuc van » duc van, luc van, vuc van
su viet » so viet
va cam » va cham, va cac, va cao

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