Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh don » hanh dong, nhanh dong, hanh doanh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, tu cach
te sach » toc sach
thi van » thi lan, thi hanh, thi nang
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
don su » dong su, down su, dan su
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 (te sach)) ky nang x hoi. thi van nam thuc va hanh don su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang x hoi. thi van nam thuc va hanh don su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang x hoi. thi van nam thuc va hanh don su triet*.