Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
tan hanh » tang hanh, toan hanh, tran hanh
thai cua » than cua, tai cuc, tri cua
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
gia duc » giao duc, gia muc, gia thuc
vai cua » dai cua, hai cua, lai cua
va gia » va giai

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 ky nang xa hoi. hieu va gia duc ((tan hanh) OR (tan thanh)) ((vai cua) OR (thai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu va gia duc ((tan hanh) OR (tan thanh)) ((vai cua) or (thai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va gia duc ((tan hanh) OR (tan thanh)) ((vai cua) or (thai cua)) tre*.