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
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
sac ky » cac ky, sai ky
le nam » he nam, le na, te nam
di cua » dai cua, doi cua, de cua
su sac » su sach, su cac, su xac

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