Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
su hai » su tai
su sai » su tai, su dai, su mai

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 sai) OR (su hai)) ky lang xa hoi. hieu ve cac duc ((van ban) OR (ban hanh)) thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) OR (su hai)) ky lang xa hoi. hieu ve cac duc ((van ban) or (ban hanh)) thai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sai) OR (su hai)) ky lang xa hoi. hieu ve cac duc ((van ban) or (ban hanh)) thai cua tre*.