Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, cau treo
sach ky » sac ky, sach y, sach ty
ca tren » cu tren, la tren, co tren
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang x hoi. hieu ve cac xuc va hanh vi ((cua tre) or (((ca tren) or (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ve cac xuc va hanh vi ((cua tre) OR (((ca tren) OR (cau tren)))).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ve cac xuc va hanh vi ((cua tre) or (((ca tren) or (cau tren))))*.