Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua viet » ca viet, hoa viet, cua vat
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
va than » van than, va phan, va tham
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang

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