Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
sach vu » sach va, sach tu, sach uu
hanh ki » hanh vi, hanh ky, hanh kien
xuc van » duc van, luc van, vuc van
te sach » toc sach
sang ma » tang ma, nang ma, sang tao
vu sang » vua sang, vu dang, vu san
va dao » ca dao
ma hoi » mai hoi, xa hoi, ma hoa
va cao » va co, va bao
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach vu sang ma hoi. hieu ((va cac) or (((va cao) or (va dao)))) xuc van hanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu sang ma hoi. hieu ((va cac) OR (((va cao) OR (va dao)))) xuc van hanh ki su triet.
• Adding a wildcard symbol may retrieve word variants: te sach vu sang ma hoi. hieu ((va cac) or (((va cao) or (va dao)))) xuc van hanh ki su triet*.