Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
su sach » so sach
vu sach » vu bach, vu khach
ve nam » he nam, va nam, le nam
vi cua » vai cua, di 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)) ky nang ((5 hoi) or (o hoi)). hieu ve nam thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang ((5 hoi) OR (o hoi)). hieu ve nam thuc va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang ((5 hoi) or (o hoi)). hieu ve nam thuc va hanh vi cua triet*.