Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
gianh lai » gian lan
pham thuc » phap thuc, pham chuc, nham thuc
tang mai » tang ma, tang tai, lang mai
hieu sau » hieu su, hieu suat, tieu su
sau pham » san pham, su pham, cau pham
danh lai » danh sai, dinh lam, hanh lam
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet

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 tang mai hoi. hieu sau pham thuc va ((danh lai) OR (gianh lai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky tang mai hoi. hieu sau pham thuc va ((danh lai) OR (gianh lai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky tang mai hoi. hieu sau pham thuc va ((danh lai) OR (gianh lai)) cua tre*.