Perhaps you should try some spelling variations:
hanh dieu » han dieu, hinh dieu, hoang dieu
toc sach » hoc sach, doc sach, thuoc sach
dieu cua » dieu tra
thuc ban » thuoc ban, thuc dan, thu ban
phuc ban » phuc van, thuoc ban, phuc hang
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
va cau » van cau, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
va dau » va dao

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 ky nang ma hoi. hieu ((va cau) or (va dau)) ((phuc ban) OR (thuc ban)) hanh dieu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ma hoi. hieu ((va cau) OR (va dau)) ((phuc ban) OR (thuc ban)) hanh dieu cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ma hoi. hieu ((va cau) or (va dau)) ((phuc ban) OR (thuc ban)) hanh dieu cua tre*".