Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc dan, thuc day
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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: tu sach v nang xa hoi. ((hieu ve) OR (hieu qua)) cau ((thuc va) OR (thuc vat)) hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang xa hoi. ((hieu ve) or (hieu qua)) cau ((thuc va) OR (thuc vat)) hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang xa hoi. ((hieu ve) or (hieu qua)) cau ((thuc va) OR (thuc vat)) hanh vi cua triet*.