Perhaps you should try some spelling variations:
ban hang » ngan hang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
cu tren » tu tren, dua tren
tu can » tu ban, thu canh
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
di cu » di cau, di cua, di du

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

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