Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van anh
cuu tre » cua tre, cau treo
xuc van » duc van, luc van, xuc ban
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
lang xa » dang xay, lang van
lang ha » long ha
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
tu sac » tu sach, tu cac, tu san

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 sac ky ((lang xa) OR (lang ha)) hoi. hieu ve cac xuc van hanh vi ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((lang xa) or (lang ha)) hoi. hieu ve cac xuc van hanh vi ((cuu tre) OR (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((lang xa) or (lang ha)) hoi. hieu ve cac xuc van hanh vi ((cuu tre) OR (cau tren))*.