Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu le » hieu ve, hieu he, hieu ly
hoa doi » hoa dai, hoc doi, hoa duoc
sac ky » sai ky
le am » le ham, le nam, le a

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sac ky) or (cac ky)) lang ((hoa doi) OR (xoa doi)). hieu le am thuc va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sac ky) OR (cac ky)) lang ((hoa doi) OR (xoa doi)). hieu le am thuc va hanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sac ky) or (cac ky)) lang ((hoa doi) OR (xoa doi)). hieu le am thuc va hanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: te ((sac ky) or (cac ky)) lang ((hoa doi) OR (xoa doi)). hieu le am thuc va hanh vai cua viet*.