Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
thuc dan » hoc dan, thuc vat
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky danh » ky anh, ky dang
hieu ly » hieu ky, lieu ly, dieu ly
va hoi » xa hoi, va hoc, va hoa
vi va » vi van, vai va, vu va

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 danh ((va hoi) or (hoa hoi)). hieu ly nam ((thuc dan) or (thuc hanh)) thanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky danh ((va hoi) OR (hoa hoi)). hieu ly nam ((thuc dan) OR (thuc hanh)) thanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky danh ((va hoi) or (hoa hoi)). hieu ly nam ((thuc dan) or (thuc hanh)) thanh vi va triet*.