Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
tham duc » pham duc, tham du, than duc
van hanh » ban hanh, van anh, van ban
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
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 tham duc ((van hanh) or (van thanh)) vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu va tham duc ((van hanh) OR (van thanh)) vai cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu va tham duc ((van hanh) or (van thanh)) vai cua vat*.