Perhaps you should try some spelling variations:
sach kem » hanh kem
van anh » van thanh, tuan anh, van minh
sach ky » sach y, sach ty, sach hay
hieu ve » hieu va, hieu van
ban bo » can bo, ban do, ban co
anh vi » hanh vi, anh va, anh ve
bo van » vo van, so van, do van
sac ky » cac ky, sai ky
ve ban » te ban, va ban, ve bao
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((((sach ky) or (sach kem))) or (sac ky)) nang x hoi. hieu ve ban bo van anh vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach kem))) OR (sac ky)) nang x hoi. hieu ve ban bo van anh vi va thiet.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) or (sach kem))) or (sac ky)) nang x hoi. hieu ve ban bo van anh vi va thiet*.