Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
hieu ve » hieu van
nang co » nang cao, nang doc, nang noi
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
vi cau » va cau, ve cau, di cau

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 sach y nang co hoi. ((hieu ve) OR (hieu va)) cham ((xuc va) OR (luc va)) hanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang co hoi. ((hieu ve) or (hieu va)) cham ((xuc va) OR (luc va)) hanh vi cau tren~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang co hoi. ((hieu ve) or (hieu va)) cham ((xuc va) OR (luc va)) hanh vi cau tren*.