Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh dai » danh dau, danh di, danh sai
cham tuc » nham thuc, pham thuc, tham thuc
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
may khoa » da khoa, ly khoa, y khoa
mai khoa » tai khoa, dai khoa, mai khoi
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, dua tren
te sach » toc sach
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((mai khoa) OR (may khoa)). hieu van cham tuc va danh dai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((mai khoa) OR (may khoa)). hieu van cham tuc va danh dai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((mai khoa) OR (may khoa)). hieu van cham tuc va danh dai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((mai khoa) OR (may khoa)). hieu van cham tuc va danh dai ((cua tre) or (cua triet))*.