Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban hanh » ban hang
va triet » va thiet, va trien, ve triet
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
luc ban » duc ban, cuc ban, luc bat
nang xa » nang x, lang xa, mang xa
hanh ve » hanh vi, hanh va, hanh kem
va cao » va cac, va dao, va bao
va co » vo co
ve va » ve van, te va, ke va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky ((nang xa) or (nang ma)) hoi. lieu ((va cao) OR (va co)) luc ban hanh ve va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang xa) OR (nang ma)) hoi. lieu ((va cao) OR (va co)) luc ban hanh ve va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((nang xa) or (nang ma)) hoi. lieu ((va cao) OR (va co)) luc ban hanh ve va triet".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang xa) or (nang ma)) hoi. lieu ((va cao) OR (va co)) luc ban hanh ve va triet*.