Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dinh cuu » dinh chi
va triet » va thiet, va trien, ve triet
dinh cu » dinh chuc, dinh chau, dinh chi
y nang » ky nang, ly nang, v nang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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