Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va xanh » va danh, va hanh, va anh
co tuc » co thuc, co tu, co toc
tuc va » thuc va, truc va, tuc xa
va co » vo co
di va » dai va, doi va, di vat

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu va co tuc va xanh ((di va) OR (di vao)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va co tuc va xanh ((di va) OR (di vao)) triet*.