Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thanh de » hanh de, thanh ve, thanh do
thuc van » thuc vat, thuc dan, thuc va
ve chat » va chat, van chat
su sach » so sach, vu sach
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
y nang » ky nang, ly nang, v nang
de cua » le cua, te cua, dieu cua
ve cai » va cai, ve cac, ve tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ((mai hoi) OR (lai hoi)). hieu ((ve cai) or (ve chat)) thuc van thanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((mai hoi) OR (lai hoi)). hieu ((ve cai) OR (ve chat)) thuc van thanh de cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((mai hoi) OR (lai hoi)). hieu ((ve cai) or (ve chat)) thuc van thanh de cua triet*".