Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
than duc » tran duc, phan duc, than doc
ban hanh » ban hang
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va than » va thanh, van than, va phan
vai cua » dai cua, hai cua, lai cua
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 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 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 duc ((ban hanh) or (van thanh)) vai cua viet*.