Perhaps you should try some spelling variations:
tinh doi » trinh doc, trinh do, tinh hoc
sach ty » sach y, sach thu, xach tay
doi cua » dai cua, hoi cua
va tinh » may tinh
cau tuc » cau truc, cau tu, cau luc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
sach tu » sach thu, cach tu, sach uu
tuc va » thuc va, truc va, tuc xa

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: thu ((sach ty) OR (sach tu)) lang xa hoi. ((hieu ve) OR (hieu va)) cau tuc va tinh doi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) OR (sach tu)) lang xa hoi. ((hieu ve) or (hieu va)) cau tuc va tinh doi cua tre~".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) OR (sach tu)) lang xa hoi. ((hieu ve) or (hieu va)) cau tuc va tinh doi cua tre*.