Perhaps you should try some spelling variations:
thien van » thi van
nam thuoc » nam thu, nha thuoc, cay thuoc
cua triet » cua viet, su triet, va triet
nam thuc » am thuc, nam thu, nam tu
danh dai » danh dau, danh di, danh sai
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
va danh » va dinh, va dan, va hanh
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) OR (su sach)) ky nang x hoi. thien van ((nam thuc) or (nam thuoc)) va danh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. thien van ((nam thuc) OR (nam thuoc)) va danh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang x hoi. thien van ((nam thuc) or (nam thuoc)) va danh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang x hoi. thien van ((nam thuc) or (nam thuoc)) va danh dai cua triet*.