Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh tai, hanh van
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
cau xuc » cam xuc, cau luc, cau truc
sach ty » sach y, sach thu, xach tay
van cau » van dau, van hau, van chat
nang ma » tang ma, sang ma, nang cao
sach tu » sach thu, cach tu, sach uu
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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