Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
va thanh » ban thanh, va tinh, le thanh
lam duoc » nam duoc, luat duoc, lam thuoc
so sach » so sanh, bo sach, co sach
van lam » van nam
y nang » ky nang, ly nang, may nang
co hoi » co hoc, co loi
v nang » va nang, vu nang, van nang
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((y nang) OR (v nang)) co hoi. hieu van lam duoc ((va thanh) or (gia thanh)) ca cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y nang) OR (v nang)) co hoi. hieu van lam duoc ((va thanh) OR (gia thanh)) ca cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((y nang) OR (v nang)) co hoi. hieu van lam duoc ((va thanh) or (gia thanh)) ca cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ((y nang) OR (v nang)) co hoi. hieu van lam duoc ((va thanh) or (gia thanh)) ca cua triet*.