Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va triet » va trien, ve triet, cua triet
hieu ve » hieu va, hieu van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
dinh cu » dinh cuu, dinh chuc, dinh chau
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang x hoi. hieu ve cac ((xuc van) OR (duc van)) dinh cu ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ve cac ((xuc van) OR (duc van)) dinh cu ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ve cac ((xuc van) OR (duc van)) dinh cu ((va triet) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ve cac ((xuc van) OR (duc van)) dinh cu ((va triet) or (va thiet))*.