Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
thuc van » thuc vat, thuc dan, thuc va
su sach » so sach, vu sach
tai cua » thai cua, tai cuc, tri cua
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
ve cac » vien cac
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 nang o hoi. hieu ((ve cac) or (va cac)) ((thuc van) or (luc van)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hoi. hieu ((ve cac) OR (va cac)) ((thuc van) OR (luc van)) hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang o hoi. hieu ((ve cac) or (va cac)) ((thuc van) or (luc van)) hanh tai cua tre*.