Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
dinh cu » dinh cuu, dinh chuc, dinh chau
y nang » ky nang, ly nang, v nang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
cu va » cuu va, tu va, su va

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 xa hoi. hieu ((ve cam) or (ve cac)) duc va dinh cu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. hieu ((ve cam) OR (ve cac)) duc va dinh cu va triet.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu ((ve cam) or (ve cac)) duc va dinh cu va triet*.