Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. lieu va cao ((tuc va) OR (thuc vat)) hanh tai ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. lieu va cao ((tuc va) or (thuc vat)) hanh tai ((cua tre) OR (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. lieu va cao ((tuc va) or (thuc vat)) hanh tai ((cua tre) OR (cuu tre))*.