Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
dang tay » dang xay, dung tay, dan tay
tay hoi » tay ho, tao hoi, tay thai
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
y dang » ky dang, 2 dang, _ dang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (thuoc sach)) y dang tay hoi. hieu van cham soc ((van hanh) or (va danh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) y dang tay hoi. hieu van cham soc ((van hanh) OR (va danh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuoc sach)) y dang tay hoi. hieu van cham soc ((van hanh) or (va danh)) vi cua tre*.