Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuoc van » thuoc va, thuc van, thuoc ban
nam thuoc » nam thuc, nam thu, nha thuoc
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
hieu he » hiem he, hieu le, hieu hien
te sach » toc sach
hieu ve » hieu va, hieu van
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky dang, ky tang, tay lang

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 ((ky lang) OR (ky nang)) hoa hoi. ((hieu ve) or (hieu he)) nam thuoc van hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) hoa hoi. ((hieu ve) OR (hieu he)) nam thuoc van hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky nang)) hoa hoi. ((hieu ve) or (hieu he)) nam thuoc van hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky nang)) hoa hoi. ((hieu ve) or (hieu he)) nam thuoc van hanh dai cua triet*.