Perhaps you should try some spelling variations:
ban nhanh » ban hanh, ban thanh, ban nhan
nang xay » dang xay, nganh xay, nang xuan
xay phoi » cay phoi, cap phoi, tay hoi
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xay phoi. hieu ve cam duc ban nhanh ((tai cuc) or (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xay phoi. hieu ve cam duc ban nhanh ((tai cuc) OR (tri cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xay phoi. hieu ve cam duc ban nhanh ((tai cuc) or (tri cua)) tre*.