Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thuc dan » thuc hanh, hoc dan, thuc vat
thuc va » thuc vat, thuc day
hanh ve » hanh vi, hanh va, hanh kem
lang ha » long ha
hieu le » hieu ve, hieu he, hieu ly
sac ky » sai ky
ha hoi » hoa hoi, ha noi, xa hoi
le nam » ly nam, he nam, le na
ve su » va su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) lang ha hoi. hieu le nam ((thuc va) OR (thuc dan)) hanh ve su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (cac ky)) lang ha hoi. hieu le nam ((thuc va) OR (thuc dan)) hanh ve su triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (cac ky)) lang ha hoi. hieu le nam ((thuc va) OR (thuc dan)) hanh ve su triet*.