Perhaps you should try some spelling variations:
trung va » truong va, trang va, trung ha
cua viet » ca viet, hoa viet, cua vat
ly lang » ly hang, ly vang, le lang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
va cam » va cham, va cai, va cau
va cao » va co, va dao, va bao
di cua » dai cua, doi cua, de cua
toan » tran

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 ly lang xa hoi. hieu ((((va cam) OR (va cao))) or (va cac)) trung va hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat toan ly lang xa hoi. hieu ((((va cam) OR (va cao))) OR (va cac)) trung va hanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat toan ly lang xa hoi. hieu ((((va cam) OR (va cao))) or (va cac)) trung va hanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: thuat toan ly lang xa hoi. hieu ((((va cam) OR (va cao))) or (va cac)) trung va hanh di cua viet*.