Perhaps you should try some spelling variations:
cao thuc » cao thuoc, bao thuc, can thuc
hanh vai » hanh vi, hanh va, hanh van
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
x hoi » o 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: te sach y nang ((x hoi) or (xa hoi)). lieu va cao thuc va ((hanh vai) OR (hanh tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((x hoi) OR (xa hoi)). lieu va cao thuc va ((hanh vai) OR (hanh tai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((x hoi) or (xa hoi)). lieu va cao thuc va ((hanh vai) OR (hanh tai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((x hoi) or (xa hoi)). lieu va cao thuc va ((hanh vai) OR (hanh tai)) cuu tre*.