Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
cau thuc » cau truc, cuu thuc, can thuc
tu sach » thu sach, su sach, te sach
tinh da » tinh va, tinh gia, tinh lao
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
hieu va » hieu qua
da cuu » da cau, da cu, da cua
x hoi » o hoi, x ho, 5 hoi

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 nang ((x hoi) OR (xa hoi)). ((lieu va) OR (hieu va)) cau thuc va tinh da cuu tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach thu nang ((x hoi) or (xa hoi)). ((lieu va) or (hieu va)) cau thuc va tinh da cuu tre*.