Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
doi cua » dai cua, hoi cua, dong cua
dua ban » dia ban, cua ban, qua ban
cam dua » ca dua, cay dua, chay dua
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
va cam » va cham, va cac, va cao
vi cua » vai cua
di cua » dai cua, de cua, do cua

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 ty nang xa hoi. hieu va cam dua ban thanh ((vi cua) or (((di cua) or (doi cua)))) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang xa hoi. hieu va cam dua ban thanh ((vi cua) OR (((di cua) OR (doi cua)))) tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang xa hoi. hieu va cam dua ban thanh ((vi cua) or (((di cua) or (doi cua)))) tre*.