Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, danh va, doanh van
nang doc » nang luc
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, te sach, tu cach
doc hoi » duoc hoi, hoc hoi, doc hai
su sach » so sach, vu sach
va lap » va dap
va am » va lam, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang doc hoi. hieu ((va am) OR (va lap)) thuc va danh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang doc hoi. hieu ((va am) or (va lap)) thuc va danh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang doc hoi. hieu ((va am) or (va lap)) thuc va danh vai cua triet*.