Perhaps you should try some spelling variations:
ban hang » ngan hang
tu cham » toc cham, thi cham
cham ky » pham ky, cam ky
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, qua cham
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cham ky nang ((x hoi) or (x ho)). hieu vu cham soc ((ban hang) or (va danh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cham ky nang ((x hoi) OR (x ho)). hieu vu cham soc ((ban hang) OR (va danh)) di cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu cham ky nang ((x hoi) or (x ho)). hieu vu cham soc ((ban hang) or (va danh)) di cuu tre*.