Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
thuc ban » thuoc ban, thu ban, thuc van
vai cua » dai cua, hai cua, lai cua
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 san » thu san, tu ban, tu can

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

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