Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cau tuc » cau truc, cau tu, cau luc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
cao hoi » cau hoi, co hoi, tao hoi
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang ((cao hoi) or (cao hoc)). ((hieu ve) or (lieu va)) cau tuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((cao hoi) OR (cao hoc)). ((hieu ve) OR (lieu va)) cau tuc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((cao hoi) or (cao hoc)). ((hieu ve) or (lieu va)) cau tuc va hanh vai cua tre*.