Perhaps you should try some spelling variations:
trung va » truong va, trang va, trung ha
hanh doi » thanh doi, hanh noi, hang doi
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
va hanh » van hanh, va thanh, va danh
doi cua » dai cua, hoi cua
va cam » va cac, va cao, va cai

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)) trung va hanh doi 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)) trung va hanh doi cua viet.
• Adding a wildcard symbol may retrieve word variants: thuat toan ky lang xa hoi. hieu ((va cam) or (va cham)) trung va hanh doi cua viet*.