Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » cua viet, su triet, va triet
thuc ban » thuoc ban, thuc dan, thu ban
nang may » mang may, nang ma, bang may
hanh va » hang va
va nham » va cham, va tham, va nha
hieu va » lieu va, hieu qua
may hoi » may thoi, tay hoi, mai hoi
tu sach » thu sach, su sach, te sach
tu sac » tu cac, tu san, tu bac

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

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