Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
van anh » van thanh, tuan anh, van minh
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
cac so » cac co, cac bo, cac ho
so van » su van, vo van
anh vi » hanh vi, anh va, anh ve
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: tu ((sach ky) or (sac ky)) nang x hoi. hieu ve cac so van anh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang x hoi. hieu ve cac so van anh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang x hoi. hieu ve cac so van anh vi cua viet*.