Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
thuc ban » thuoc ban, thuc dan, thu ban
vai cua » dai cua, hai cua, lai cua
va nham » va cham, va tham, va nha
hieu va » lieu va, hieu qua
tay hoi » tay ho, tao hoi, tay thai
may hoi » may thoi, mai hoi, may hmi
ky mang » ky nang, ke mang, ky dang
tu bai » tu ban, tu bat, te bai
tu sai » tu san, tu cai, tu lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sai) or (tu bai)) ky mang ((may hoi) OR (tay hoi)). hieu va nham thuc ban hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu bai)) ky mang ((may hoi) OR (tay hoi)). hieu va nham thuc ban hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) or (tu bai)) ky mang ((may hoi) OR (tay hoi)). hieu va nham thuc ban hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) or (tu bai)) ky mang ((may hoi) OR (tay hoi)). hieu va nham thuc ban hanh vai cua triet*.