Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vi » hanh vi, dinh vi, danh di
hieu va » lieu va, hieu qua
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
co sach » bo sach, cuon sach, hoc sach
va cao » va cac, va co, va dao
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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 sach) OR (co sach)) ky lang xa hoi. hieu va cao ((xuc va) OR (tuc va)) danh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (co sach)) ky lang xa hoi. hieu va cao ((xuc va) OR (tuc va)) danh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (co sach)) ky lang xa hoi. hieu va cao ((xuc va) OR (tuc va)) danh vi cua triet*.