Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van thanh » ban thanh
hieu van » hieu va, thien van, lieu va
vinh cuu » dinh cuu, sinh cua, dinh cu
tuan soc » quan so, xuan son, dan soc
van tuan » van quan, van ban, anh tuan
van anh » tuan anh, van minh
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
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: thuat sach y nang ((x hoi) or (o hoi)). hieu van tuan soc ((van anh) or (van thanh)) vinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang ((x hoi) OR (o hoi)). hieu van tuan soc ((van anh) OR (van thanh)) vinh cuu tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ((x hoi) or (o hoi)). hieu van tuan soc ((van anh) or (van thanh)) vinh cuu tre*.