Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
van anh » van thanh, tuan anh, van minh
anh thi » anh tho, dinh thi, dang thi
thi cuc » tai cuc
cuc tre » duc tre, cua tre, cuu tre
ve cam » ve cham, ve cac, va cam
o hoc » co hoc, mo hoc, so hoc
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 ky nang ((o hoc) or (o hai)). hieu ve cam xuc van anh thi cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((o hoc) OR (o hai)). hieu ve cam xuc van anh thi cuc tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hoc) or (o hai)). hieu ve cam xuc van anh thi cuc tre*.