Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
so sach » so sanh, co sach, hoc sach
hieu va » lieu va, hieu qua
bo sach » co sach, hoc sach
thu va » thuc va, thue va, tu va
ca thu » cac thu, cam thu, ca tru
va ca » va cac, va cao, va cai
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: ((so sach) OR (bo sach)) ky nang x hoi. hieu va ca thu va danh va ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ky nang x hoi. hieu va ca thu va danh va ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) ky nang x hoi. hieu va ca thu va danh va ((cua triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (bo sach)) ky nang x hoi. hieu va ca thu va danh va ((cua triet) or (va triet))*.