Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
tuc va » thuc va, tuc xa, duc va
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: ((vu bach) OR (su sach)) ky lang xa hoi. hieu ve cac ((tuc va) OR (truc va)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu bach) or (su sach)) ky lang xa hoi. hieu ve cac ((tuc va) OR (truc va)) hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (su sach)) ky lang xa hoi. hieu ve cac ((tuc va) OR (truc va)) hanh vi cua tre*.