Perhaps you should try some spelling variations:
chat soc » cham soc, chat hoc, chat doc
ban hang » ngan hang
cau tren » cu tren, dau tren, ca tren
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
va danh » va dinh, va dan, va hanh
tu nam » su nam
nam ky » cam ky, nam ly
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 nam ky nang x hoi. hieu va chat soc ((ban hang) or (va danh)) di cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu nam ky nang x hoi. hieu va chat soc ((ban hang) OR (va danh)) di cau tren.
• Adding a wildcard symbol may retrieve word variants: tu nam ky nang x hoi. hieu va chat soc ((ban hang) or (va danh)) di cau tren*.