Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
duoc ban » duc ban, buoc ban, duoc bat
quoc ban » quoc bao, quoc lan, quoc quan
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van lam » van nam
vai cua » dai cua, hai cua, lai cua
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 ky nang xa hoi. hieu van lam ((duoc ban) OR (quoc ban)) thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu van lam ((duoc ban) OR (quoc ban)) thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van lam ((duoc ban) OR (quoc ban)) thanh vai cua tre*.