Perhaps you should try some spelling variations:
sach ty » sach y, sach thu, xach tay
thi cuu » thi cuc, thi huu, thi cu
anh thi » anh tho, dinh thi, dang thi
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
sach tu » sach thu, cach tu, sach uu
ve cac » va cac, vien cac
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) OR (sach tu)) hang ((o hoi) or (o hai)). hieu ve cac xuc van anh thi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) hang ((o hoi) OR (o hai)). hieu ve cac xuc van anh thi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach tu)) hang ((o hoi) or (o hai)). hieu ve cac xuc van anh thi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach tu)) hang ((o hoi) or (o hai)). hieu ve cac xuc van anh thi cuu tre*.