Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vai » thanh hai, thanh van, thanh tai
nam thuc » nam thuoc, am thuc, nam tu
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, dam thuc
vai cua » dai cua, hai cua, lai cua

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 dang xa hoi. hieu ve ((cam tuc) or (((nam thuc) OR (nam thu)))) van thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ve ((cam tuc) OR (((nam thuc) OR (nam thu)))) van thanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu ve ((cam tuc) or (((nam thuc) OR (nam thu)))) van thanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ve ((cam tuc) or (((nam thuc) OR (nam thu)))) van thanh vai cua viet*.