Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam duoc » nam thuoc, da duoc, dat duoc
su sach » so sach, vu sach
ty nang » ty xang, ty hang, ly nang
thi van » thi lan, thi hanh, thi nang
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
lam cua » nam cua, lam chat
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: su sach ((ty nang) or (ky nang)) x hoi. thi van nam duoc ((va hanh) OR (va danh)) lam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) x hoi. thi van nam duoc ((va hanh) OR (va danh)) lam cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) or (ky nang)) x hoi. thi van nam duoc ((va hanh) OR (va danh)) lam cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ky nang)) x hoi. thi van nam duoc ((va hanh) OR (va danh)) lam cua triet*.