Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
danh sai » dung sai, danh bat, danh dau
hieu van » hieu va, thien van, lieu va
xa danh » va danh, dia danh, nam danh
tu sach » thu sach, su sach, te sach
cau tuc » cau truc, cau tu, cau luc
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
van cau » van dau, van hau, van chat

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 lang) or (ky dang)) xa hoi. hieu van cau tuc xa danh sai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) xa hoi. hieu van cau tuc xa danh sai ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky dang)) xa hoi. hieu van cau tuc xa danh sai ((cua triet) OR (va triet))*".