Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
sach ky » sac ky, sach y, sach ty
ve bao » va bao
do van » dao van, vo van
so van » su van, vo van
vi cua » vai cua, di cua
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 ky nang x hoi. hieu ((ve bao) or (te bao)) ((do van) or (so van)) hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu ((ve bao) OR (te bao)) ((do van) OR (so van)) hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu ((ve bao) or (te bao)) ((do van) or (so van)) hanh vi cua viet*.