Perhaps you should try some spelling variations:
sang tao » hang tai
hieu van » hieu va, thien van, lieu va
chua tre » chua tri, cua tre, chua trieu
sach thu » sach thue, sach thieu, sach tham
sach tu » cach tu, sach ty, sach uu
cam tuc » cam xuc, cam tu, nam thuc
hanh va » hang va
van cam » van nam, van lam, van cau
tuc va » thuc va, truc va, tuc xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach tu) OR (sach thu)) sang tao boi. hieu van cam tuc va ((hanh va) OR (hanh vi)) chua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach tu) OR (sach thu)) sang tao boi. hieu van cam tuc va ((hanh va) or (hanh vi)) chua tre~".
• Adding a wildcard symbol may retrieve word variants: toc ((sach tu) OR (sach thu)) sang tao boi. hieu van cam tuc va ((hanh va) or (hanh vi)) chua tre*.