Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
ty nang » ky nang, ty hang, ly nang
cac suc » cao suc, cac nuoc, cac cuoc
vi cua » vai cua, di cua
o hoi » co hoi, o hoc, o hai

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) OR (ty xang)) o hoi. lieu va cac suc manh hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ty xang)) o hoi. lieu va cac suc manh hanh vi cua triet*.