Perhaps you should try some spelling variations:
hanh nhung » anh nhung, canh nhung, doanh nhung
thu sach » thuat sach, thuoc sach, thu hoach
nhung cu » nhung cau, nhung chu, chung cu
cu triet » cua triet, cau triet, su triet
tu sach » su sach, te sach, tu cach
cao hoi » cau hoi, cao hoc, tao hoi
qua hoc » cua hoc, quang hoc, qua hoat
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi
nuoc » quoc, duoc, ngoc

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) or (tu sach)) y nang ((cao hoi) or (co hoi)). hieu qua hoc nuoc va hanh nhung cu triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) y nang ((cao hoi) OR (co hoi)). hieu qua hoc nuoc va hanh nhung cu triet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) y nang ((cao hoi) or (co hoi)). hieu qua hoc nuoc va hanh nhung cu triet*.