Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
va hanh » van hanh, va thanh, ban hanh
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
cac xuc » cam xuc, cac nuoc, chat xuc
ang xa » lang xa, mang xa, dang xay
ty ang » ty xang, ty hang, ty anh
nuoc » quoc, duoc, ngoc

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 ty ang xa hoi. hieu van ((cac xuc) or (hoc nuoc)) ((va hanh) or (va danh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ang xa hoi. hieu van ((cac xuc) OR (hoc nuoc)) ((va hanh) OR (va danh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty ang xa hoi. hieu van ((cac xuc) or (hoc nuoc)) ((va hanh) or (va danh)) vai cua tre*.