Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu canh » thuc hanh, thu cong, thu ban
canh van » anh van, can van, cach van
cau thuc » cau truc, cuu thuc, can thuc
tu sach » thu sach, su sach, te sach
hieu va » hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi cua » vai cua, di cua
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu canh van hoa. ((hieu va) OR (lieu va)) cau thuc va danh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: tu sach thu canh van hoa. ((hieu va) or (lieu va)) cau thuc va danh vi cua te*.