Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
quoc ban » quoc bao, quoc lan, quoc quan
su sach » so sach, vu sach
hai cua » thai cua, dai cua, hoi cua
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky tang xa hoi. hieu ((ve cham) or (ve cac)) ((xuc van) or (quoc ban)) hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang xa hoi. hieu ((ve cham) OR (ve cac)) ((xuc van) OR (quoc ban)) hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. hieu ((ve cham) or (ve cac)) ((xuc van) or (quoc ban)) hanh hai cua tre*.