Perhaps you should try some spelling variations:
dat tren » dat trong, dua tren
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
van cham » van chat, van tham, va cham
cham xuc » cam xuc, chat xuc, cham soc
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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: tu sach ky nang ((x hoi) OR (o hoi)). hieu van cham xuc van hanh vai ((cau tren) OR (dat tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((x hoi) OR (o hoi)). hieu van cham xuc van hanh vai ((cau tren) or (dat tren))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) OR (o hoi)). hieu van cham xuc van hanh vai ((cau tren) or (dat tren))*.