Perhaps you should try some spelling variations:
thanh chat » thanh cha, thanh cham, thanh chau
hieu van » hieu va, thien van, lieu va
chat cua » nhat cua, chat va, chat huu
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
cau tuc » cau truc, cau tu, cau luc
tuc gia » tac gia, duc gia, toc gia
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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) or (v nang)) xa hoi. hieu van cau tuc gia thanh chat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) xa hoi. hieu van cau tuc gia thanh chat cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) xa hoi. hieu van cau tuc gia thanh chat cua tre*.