Perhaps you should try some spelling variations:
su triet » su viet, ve triet
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va hanh » va thanh, va danh, ban hanh
su tien » su kien, su hien, tu tieng
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang ha hoi. hieu van cau xuc ((va hanh) or (van hanh)) vi ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang ha hoi. hieu van cau xuc ((va hanh) OR (van hanh)) vi ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang ha hoi. hieu van cau xuc ((va hanh) or (van hanh)) vi ((su triet) or (su tien))*.