Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thuc dan » thuc hanh, hoc dan, thuc vat
va triet » va thiet, va trien, ve triet
hanh ve » hanh vi, hanh va, hanh kem
tuc dan » thuc day, tung dan, tuc tang
ky hang » ky nang, ly hang, ky dang
thuc va » thuc vat, thuc day
dan ky » van ky
va cam » va cham, va cac, va cao
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tuc dan ky hang va hoi. lieu va cam ((thuc va) or (thuc dan)) hanh ve ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuc dan ky hang va hoi. lieu va cam ((thuc va) OR (thuc dan)) hanh ve ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tuc dan ky hang va hoi. lieu va cam ((thuc va) or (thuc dan)) hanh ve ((va triet) or (cua viet))*.