Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ho nang » thi nang, kha nang, cao nang
lo nang » ly nang, loai nang, cao nang
di cua » dai cua, doi cua, de cua
va nam » van nam, ha nam, va nay
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((lo nang) OR (ho nang)) x hoi. hieu va nam thuc ((va hanh) or (may tinh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((lo nang) OR (ho nang)) x hoi. hieu va nam thuc ((va hanh) OR (may tinh)) di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((lo nang) OR (ho nang)) x hoi. hieu va nam thuc ((va hanh) or (may tinh)) di cua triet*".