Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
hieu van » hieu va, thien van, lieu va
van than » van thanh, van thang, van tuan
than duc » tran duc, phan duc, than doc
hanh doi » hanh noi, hang doi, hanh moi
su sach » so sach, vu sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
cao hoc » co hoc, cho hoc, chat hoc
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: su sach vu nang cao hoc. hieu van than duc va ((hanh doi) or (thanh doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach vu nang cao hoc. hieu van than duc va ((hanh doi) OR (thanh doi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach vu nang cao hoc. hieu van than duc va ((hanh doi) or (thanh doi)) cua tre*.