Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
nam truoc » nam thuoc, lam truoc, nam truong
va triet » va thiet, va trien, ve triet
tinh vai » tinh va, tinh hai, tinh bai
nam truc » nam thuc, nam trung, nam thuoc
sach ky » sac ky, sach y, sach ty
va tinh » may tinh
tu sach » thu sach, su sach, te sach
nang o » nang co, nang ho, nang ro
o lai » o lao

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 nang o lai. lieu va ((nam truoc) or (nam truc)) va tinh vai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o lai. lieu va ((nam truoc) OR (nam truc)) va tinh vai ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang o lai. lieu va ((nam truoc) or (nam truc)) va tinh vai ((cua triet) OR (va triet))*".