Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh luat » nganh luat, hang luan, hanh lam
luat cua » luat sua, xuat cua, lua cua
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
y nang » ly nang, v nang, may nang
luc va » duc va, tuc va
loc va » hoc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) OR (ky nang)) ma hoi. hieu va cam ((luc va) or (loc va)) hanh luat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) ma hoi. hieu va cam ((luc va) OR (loc va)) hanh luat cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ky nang)) ma hoi. hieu va cam ((luc va) or (loc va)) hanh luat cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ky nang)) ma hoi. hieu va cam ((luc va) or (loc va)) hanh luat cua triet*.