Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va hanh » van hanh, va thanh, va danh
dao xuc » dao duc, dao tuc, dao xu
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
va dan » ca dan, va dau, va dap
va dao » ca dao
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 sach ty ((mang xa) OR (lang xa)) hoi. hieu va dao xuc ((va hanh) OR (va dan)) ve su triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((mang xa) or (lang xa)) hoi. hieu va dao xuc ((va hanh) or (va dan)) ve su triet*.