Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
ty nang » ky nang, ty xang, ty hang
lai cua » dai cua, hai cua, lai chau
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 ty nang o hoi. ((lieu va) or (hieu qua)) cam duc ((va danh) OR (va hanh)) lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang o hoi. ((lieu va) OR (hieu qua)) cam duc ((va danh) OR (va hanh)) lai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang o hoi. ((lieu va) or (hieu qua)) cam duc ((va danh) OR (va hanh)) lai cua triet*".