Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
dao cua » dai cua, day cua, dan cua
va lanh » va lang, va danh, va hanh
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
ro hoi » co hoi, mo hoi, ro doi
va coc » va cuoc, va cac, va hoc
luc va » duc va, tuc va, loc va
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: ((tu sach) OR (thu sach)) ky nang ((ro hoi) OR (o hoi)). hieu va coc luc va lanh dao cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang ((ro hoi) or (o hoi)). hieu va coc luc va lanh dao cua tre*.