Perhaps you should try some spelling variations:
thuoc giao » hoc giao, thuat giao, nuoc giao
cac thuoc » cay thuoc, cao thuoc, tac thuoc
giao hanh » giao thanh, gia hanh, gian thanh
cau treo » cau theo, cau tren, cau triet
va triet » va thiet, va trien, ve triet
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
hanh ve » hanh vi, hanh va, hanh kem
nang xa » nang x, lang xa, mang xa
so sach » so sanh, bo sach, co sach

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. lieu va cac thuoc giao hanh ve ((cau treo) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang xa) OR (nang ma)) hoi. lieu va cac thuoc giao hanh ve ((cau treo) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang xa) or (nang ma)) hoi. lieu va cac thuoc giao hanh ve ((cau treo) or (va triet))*.