Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
cao xuc » cam xuc, cao duc, cao suc
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
va cao » va cac, va co, va dao

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: su sach ty nang cao hoi. hieu va cao xuc ((va hanh) OR (ban hanh)) vai ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang cao hoi. hieu va cao xuc ((va hanh) or (ban hanh)) vai ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang cao hoi. hieu va cao xuc ((va hanh) or (ban hanh)) vai ((cua tre) OR (cua triet))*.