Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
su triet » su viet, su tien, ve triet
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
nang ho » nang hoc, nang co, tang ho
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, v nang
ho hoi » hoc hoi, hoa hoi, hoi hoi

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 ho hoi. hieu va cam duc va hanh vi ((((cua tre) OR (su triet))) OR (cau tren))~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ho hoi. hieu va cam duc va hanh vi ((((cua tre) or (su triet))) or (cau tren))*.