Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
toan ky » than ky, toan ly, toan ke
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va cham » va chat, va tham
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
va cam » va cac, va cao, va cai
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat toan ky lang xa hoi. hieu ((va cam) or (va cham)) truc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat toan ky lang xa hoi. hieu ((va cam) OR (va cham)) truc va hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: thuat toan ky lang xa hoi. hieu ((va cam) or (va cham)) truc va hanh vi cua viet*.