Perhaps you should try some spelling variations:
tuan tai » toan tai, tan tai, tuan tuoi
quan tai » quan tri, quang tri, quan li
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

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: su sac ky ((nang xa) OR (dang xay)) hoi. hieu ve cac xuc van ((tuan tai) OR (quan tai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((nang xa) or (dang xay)) hoi. hieu ve cac xuc van ((tuan tai) OR (quan tai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((nang xa) or (dang xay)) hoi. hieu ve cac xuc van ((tuan tai) OR (quan tai)) cua tre*.