Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
xuc va » duc va, tuc va, luc va
kem va » kiem va, kiem van
thiet » thieu

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) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) chat xuc va hanh kem va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) OR (hieu van)) chat xuc va hanh kem va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) chat xuc va hanh kem va thiet".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) chat xuc va hanh kem va thiet*.