Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
xua ban » xuat ban, cua ban, qua ban
nam xua » nam cua, nam mua, nam qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sach) or (so sanh))) or (thuat sach)) ky lang xa hoi. hieu van nam xua ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (so sanh))) OR (thuat sach)) ky lang xa hoi. hieu van nam xua ban thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (so sanh))) or (thuat sach)) ky lang xa hoi. hieu van nam xua ban thanh vai cua tre*.