Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang lai » nang tai, mang lai, nang cai
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
lai hoi » dai hoi, lai hoa, lai roi
hieu va » hieu qua
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang lai hoi. ((hieu va) or (lieu va)) cam xuc ((va hanh) OR (van hanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang lai hoi. ((hieu va) OR (lieu va)) cam xuc ((va hanh) OR (van hanh)) vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang lai hoi. ((hieu va) or (lieu va)) cam xuc ((va hanh) OR (van hanh)) vai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang lai hoi. ((hieu va) or (lieu va)) cam xuc ((va hanh) OR (van hanh)) vai cua triet*.