Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
hanh hai » thanh hai, hang hai, hanh tai
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
cac xuc » cam xuc, cac nuoc, chat xuc
sach ty » sach y, sach tu, sach thu
van cac » van hac, van cau, van bac
xang xa » lang xa, mang xa, dang xay
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
ang xa » lang xa, mang xa, dang xay

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 ty ((xang xa) OR (ang xa)) hoi. hieu van cac xuc va ((hanh hai) or (nhanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((xang xa) OR (ang xa)) hoi. hieu van cac xuc va ((hanh hai) OR (nhanh hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty ((xang xa) OR (ang xa)) hoi. hieu van cac xuc va ((hanh hai) or (nhanh hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((xang xa) OR (ang xa)) hoi. hieu van cac xuc va ((hanh hai) or (nhanh hai)) cua tre*.