Perhaps you should try some spelling variations:
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
vai cua » dai cua, hai cua, lai cua
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tay hoi » tay ho, tao hoi, tay thai
xay hoi » xa hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
cham o » cham soc
vi cua » di cua
o ban » co ban, lo ban, do ban

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 ky dang ((xay hoi) or (tay hoi)). hieu ve cham o ban hanh ((vi cua) or (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang ((xay hoi) OR (tay hoi)). hieu ve cham o ban hanh ((vi cua) OR (vai cua)) te.
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang ((xay hoi) or (tay hoi)). hieu ve cham o ban hanh ((vi cua) or (vai cua)) te*.