Perhaps you should try some spelling variations:
thien van » thi van
cay thuoc » cua thuoc, nam thuoc, va thuoc
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
vanh dai » van dai, vanh tai, lanh dao
sach ky » sach y, sach ty, sach kem
va vanh » va van, va danh, va hanh
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

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

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