Perhaps you should try some spelling variations:
ban hang » ngan hang
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
tu cam » tu cham, tu cac, tu nam
cam ky » cao ky, cac ky
di cau » da cau, diem cau
x hoi » xa hoi, o hoi, x ho

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

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