Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
dung tay » dung tai, vung tay, dung va
dung may » dung va, dung tai, mang may
nam qua » nam quan, nam cua, nam mua
nam xuc » cam xuc, nam xua, nam thuc
thi lan » thi hanh, thi nang, thi lien
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sac o, sach y
vi cua » vai cua, di cua

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 o ((dung tay) OR (dung may)) hoi. thi lan ((nam xuc) OR (nam qua)) van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach o ((dung tay) OR (dung may)) hoi. thi lan ((nam xuc) or (nam qua)) van hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach o ((dung tay) OR (dung may)) hoi. thi lan ((nam xuc) or (nam qua)) van hanh vi cua tre*.