Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua viet » ca viet, hoa viet, cua vat
va thanh » gia thanh, ban thanh, le thanh
van hanh » ban hanh, van anh, van ban
vai cua » dai cua, hai cua, lai 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
va tinh » may tinh

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