Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nam thuc » nam thuoc, am thuc, nam tu
danh ve » dinh ve, hanh ve, anh ve
va danh » va dinh, va dan, va hanh
hieu le » hieu ve, hieu he, hieu ly
lang ha » long ha
ha hoi » hoa hoi, ha noi, xa hoi
sac ky » sai ky
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) OR (nam thu)) va danh 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) OR (nam thu)) va danh ve su triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (cac ky)) lang ha hoi. hieu le ((nam thuc) OR (nam thu)) va danh ve su triet*.