Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, nhanh hai, hang hai
vu sach » vu bach, su sach, vu khach
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang ((x hoi) or (xa hoi)). ((hieu ve) or (hieu van)) cam tuc va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang ((x hoi) OR (xa hoi)). ((hieu ve) OR (hieu van)) cam tuc va hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang ((x hoi) or (xa hoi)). ((hieu ve) or (hieu van)) cam tuc va hanh hai cua tre*.