Perhaps you should try some spelling variations:
cam luoc » cam xuc, tom luoc, cam lo
can hanh » ban hanh, dan hanh, dang hanh
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
kem cua » em cua, keo cua, diem cua
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
o hoi » co hoi, o hoc, o hai

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: te sach ky nang ((o hoi) OR (xa hoi)). hieu ve cam luoc ((can hanh) OR (van hanh)) kem cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((o hoi) or (xa hoi)). hieu ve cam luoc ((can hanh) OR (van hanh)) kem cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((o hoi) or (xa hoi)). hieu ve cam luoc ((can hanh) OR (van hanh)) kem cua tre*.