Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
ve triet » va trien
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien
thanh vi » hanh vi, thanh va, thanh ve
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
sach ty » sach y, sach thu, xach tay
nang ma » tang ma, sang ma, nang cao
sach tu » sach thu, cach tu, sach uu
van cam » van nam, van lam, van cau
ma hoi » mai hoi, xa hoi, ma hoa

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) OR (sach tu)) nang ma hoi. hieu van cam duc van thanh vi ((su triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach tu)) nang ma hoi. hieu van cam duc van thanh vi ((su triet) OR (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) nang ma hoi. hieu van cam duc van thanh vi ((su triet) OR (ve triet))*.