Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
su triet » su viet, su tien, ve triet
hieu va » hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
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. ((lieu va) or (hieu va)) cam tuc va hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. ((lieu va) OR (hieu va)) cam tuc va hanh va su triet.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. ((lieu va) or (hieu va)) cam tuc va hanh va su triet*.