Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
nhan thuc » nhan luc, dan thuc, toan thuc
dinh vai » dinh van, dinh vi, dinh va
vai cuu » vai cua
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
va nhan » van nhan, ca nhan, va phan
cuu tre » cua tre, cau tren, cau treo
x hoi » xa hoi, x ho, 5 hoi
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: ((thuoc sach) or (thuat sach)) ky nang ((x hoi) or (o hoi)). lieu va nhan thuc va dinh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) ky nang ((x hoi) OR (o hoi)). lieu va nhan thuc va dinh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat sach)) ky nang ((x hoi) or (o hoi)). lieu va nhan thuc va dinh vai cuu tre*.