Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dang cay » dang xay, dang ca, dang cac
cay phoi » cap phoi, tay hoi, cay cho
thuc va » thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
hieu va » hieu qua
ky dang » ky nang, ky danh
dan va » doan va, dan ca, ban va
va cuu » va cau, va chu, va huu

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 dang cay phoi. ((hieu va) or (lieu va)) nam ((thuc va) OR (thuc vat)) dan va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky dang cay phoi. ((hieu va) OR (lieu va)) nam ((thuc va) OR (thuc vat)) dan va cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky dang cay phoi. ((hieu va) or (lieu va)) nam ((thuc va) OR (thuc vat)) dan va cuu tre*".