Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nham thuc » nhan thuc, nam thuc, nham thu
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
thuc ban » thuoc ban, thuc dan, thu ban
va nham » va cham, va tham, va nha
hieu va » lieu va, hieu qua
may hoi » may thoi, tay hoi, mai hoi
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. hieu va nham thuc ban ((hanh vai) OR (hanh tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu bai)) ky mang may hoi. hieu va nham thuc ban ((hanh vai) OR (hanh tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) or (tu bai)) ky mang may hoi. hieu va nham thuc ban ((hanh vai) OR (hanh tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) or (tu bai)) ky mang may hoi. hieu va nham thuc ban ((hanh vai) OR (hanh tai)) cua triet*.