Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
tinh di » tinh doi, trinh di, tinh da
cau tre » cau tren, cau treo, cau tra
hieu ve » hieu va, hieu van
y hang » ly hang, ty hang, yu hang
tuc va » thuc va, truc va, tuc xa
hang x » nang x, hoang xa, chang xu
di cau » da cau, diem cau
x hoi » xa hoi, o hoi, x ho

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 y hang x hoi. ((hieu ve) OR (hieu qua)) cau ((tuc va) OR (thuc dan)) tinh di cau tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach y hang x hoi. ((hieu ve) or (hieu qua)) cau ((tuc va) or (thuc dan)) tinh di cau tre*.