Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
van hanh » van thanh, ban hanh, van anh
cau xuc » cam xuc, cau luc, chat xuc
su sach » so sach, vu sach
xang xa » lang xa, mang xa, ang xa
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 thu ((xang xa) or (mang may)) hoi. hieu van ((cau xuc) or (cau truc)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((xang xa) OR (mang may)) hoi. hieu van ((cau xuc) OR (cau truc)) van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach thu ((xang xa) or (mang may)) hoi. hieu van ((cau xuc) or (cau truc)) van hanh vi cua tre*.