Perhaps you should try some spelling variations:
sach ky » sach y, sach kem, sach hay
sach ty » sach y, sach tu, sach thu
sang ma » tang ma, nang ma, sang tao
hieu va » lieu va, hieu qua
cac dat » cac dan, cai dat, cac dai
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((((sach ky) or (sac ky))) or (sach ty)) sang ma hoa. hieu va cac dat va hanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((((sach ky) OR (sac ky))) OR (sach ty)) sang ma hoa. hieu va cac dat va hanh di cua vat.
• Adding a wildcard symbol may retrieve word variants: thu ((((sach ky) or (sac ky))) or (sach ty)) sang ma hoa. hieu va cac dat va hanh di cua vat*.