Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nham thuc » nhan thuc, nam thuc, nham thu
nang may » mang may, nang ma, bang may
thuc ban » thuoc ban, thuc dan, thu ban
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
sac ky » sai ky

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 ky) OR (cac 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 ky) OR (cac 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 ky) OR (cac 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 ky) OR (cac ky)) nang may hoi. hieu va nham thuc ban ((hanh va) or (hanh vi)) cua triet*.