Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
ma hoi » mai hoi, xa hoi, ma hoa
le nam » ly nam, he nam, te nam
su xac » pu xac, su cac
di cua » dai cua, doi cua, de cua
su sac » su sach, su cac
le na » le va, le ta, le ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su xac)) ky sang ma hoi. hieu ((le nam) OR (le na)) thuc va hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky sang ma hoi. hieu ((le nam) OR (le na)) thuc va hanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky sang ma hoi. hieu ((le nam) OR (le na)) thuc va hanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky sang ma hoi. hieu ((le nam) OR (le na)) thuc va hanh di cua viet*.