Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
nam thuoc » nam thuc, nam thu, nha thuoc
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
de cua » le cua, te cua, dieu cua
cua cu » cua chu, cua cau, cua su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang xa hoi. ((hieu ve) OR (hieu qua)) nam thuoc ban hanh de cua cu~.
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang xa hoi. ((hieu ve) or (hieu qua)) nam thuoc ban hanh de cua cu*.