Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
so sach » so sanh, bo sach, co sach
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
coc duc » hoc duc, coc luc, hoc duoc
_ danh » _ doanh, _ dan, 1 danh
va coc » va cuoc, va cac, va hoc
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ky dang) or (_ danh)) xa hoi. hieu va coc duc ((va tinh) OR (may tinh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ky dang) OR (_ danh)) xa hoi. hieu va coc duc ((va tinh) OR (may tinh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky dang) or (_ danh)) xa hoi. hieu va coc duc ((va tinh) OR (may tinh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ((ky dang) or (_ danh)) xa hoi. hieu va coc duc ((va tinh) OR (may tinh)) vi cua triet*.