Perhaps you should try some spelling variations:
sang tai » hang tai, sang tao, tang tai
su sach » so sach, vu sach
va cham » va chat, va tham
tai cua » thai cua, tai cuc, tri cua
va sang » van sang, vua sang, va nang
thue va » thuc va, thuyet va, thuc vat
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va cam » va cac, va cao, va cai
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 y nang ((x hoi) or (o hoi)). hieu ((va cam) or (va cham)) thue va sang tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((x hoi) OR (o hoi)). hieu ((va cam) OR (va cham)) thue va sang tai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((x hoi) or (o hoi)). hieu ((va cam) or (va cham)) thue va sang tai cua tre*.