Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach ky » sac ky, sach y, sach ty
va chat » van chat, va phat, cao chat
so sach » so sanh, bo sach, co sach
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
su viet » so viet
vi su » va su, ve su, ki su

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 ma) or (tang ma)) hoi. lieu va chat xuc ((va hanh) or (va danh)) vi su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang ma) OR (tang ma)) hoi. lieu va chat xuc ((va hanh) OR (va danh)) vi su viet.
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang ma) or (tang ma)) hoi. lieu va chat xuc ((va hanh) or (va danh)) vi su viet*.