Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
vu sach » vu bach, vu khach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
su sach » so sach
y nang » ky nang, ly nang, v nang
ve nam » he nam, va nam, le nam
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

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) or (vu sach)) y nang ((xa hoi) or (o hoi)). hieu ve nam thuc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang ((xa hoi) OR (o hoi)). hieu ve nam thuc va hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang ((xa hoi) or (o hoi)). hieu ve nam thuc va hanh di cua triet*.