Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ky trang » ke trang, ky trong, ky tang
trang xa » trang va, trang ha, trong xa
cau thuc » cau truc, cuu thuc, can thuc
tu sach » thu sach, su sach, te sach
qua cau » quan cau, qua cac, qua ca
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
dinh di » dinh du, dinh vi, danh di
su viet » so viet
di su » doi su, ki su, da su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuoc sach)) ky trang xa hoi. hieu qua cau thuc va dinh di su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ky trang xa hoi. hieu qua cau thuc va dinh di su viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ky trang xa hoi. hieu qua cau thuc va dinh di su viet*.