Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
su sach » so sach, vu sach
cac luc » cau luc, coc luc, cac cuoc
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cai hoi » dai hoi, cai hoa, lai hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((cai hoi) or (cau hoi)). hieu ve ((cac luc) OR (cac nuoc)) va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((cai hoi) OR (cau hoi)). hieu ve ((cac luc) OR (cac nuoc)) va hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((cai hoi) or (cau hoi)). hieu ve ((cac luc) OR (cac nuoc)) va hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((cai hoi) or (cau hoi)). hieu ve ((cac luc) OR (cac nuoc)) va hanh lai cua tre*.