Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
va hanh » van hanh, va danh, ban hanh
vi su » va su, ve su, ki su

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

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