Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
van hanh » van thanh, ban hanh, van anh
nam quan » nam huan, nam qua, sam quan
nam mua » nam cua, nam qua, nam xua
ly nang » ky nang, ly hang, ly vang
hanh di » hanh vi, hanh de, hang di
tu sach » thu sach, su sach, te sach
y nang » ky nang, v nang, may nang
di cua » dai cua, doi cua, de cua
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 ((y nang) OR (ly nang)) x hoi. thien van ((nam quan) or (nam mua)) van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ly nang)) x hoi. thien van ((nam quan) OR (nam mua)) van hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (ly nang)) x hoi. thien van ((nam quan) or (nam mua)) van hanh di cua triet*".