Perhaps you should try some spelling variations:
vat hanh » vat thanh, van hanh, va hanh
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
cam thu » nam thu, cac thu, ca thu
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
di cua » dai cua, de cua, do cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang x hoi. hieu va cam thu ((vat hanh) or (ban hanh)) ((di cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x hoi. hieu va cam thu ((vat hanh) OR (ban hanh)) ((di cua) OR (doi cua)) tre.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x hoi. hieu va cam thu ((vat hanh) or (ban hanh)) ((di cua) or (doi cua)) tre*.