Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va trien » va truyen, va thiet, va tuyen
lam thuc » lam thuoc, am thuc, nam thuc
danh sai » dung sai, danh bat, danh dau
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, te sach, tu cach
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
su sach » so sach, vu sach
co hoi » co hoc, co loi
va lam » van lam, va lap

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 co hoi. hieu va lam thuc va danh sai ((cua triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang co hoi. hieu va lam thuc va danh sai ((cua triet) OR (va trien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang co hoi. hieu va lam thuc va danh sai ((cua triet) or (va trien))*".