Perhaps you should try some spelling variations:
ban hang » ngan hang
hieu ve » hieu van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cau tre » cau tren, cau treo, cau tra
tu cao » cu cao, tu cac, vu cao
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 cao ky nang x hoi. ((hieu ve) or (hieu va)) cham soc ((ban hang) or (va hanh)) di cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cao ky nang x hoi. ((hieu ve) OR (hieu va)) cham soc ((ban hang) OR (va hanh)) di cau tre.
• Adding a wildcard symbol may retrieve word variants: tu cao ky nang x hoi. ((hieu ve) or (hieu va)) cham soc ((ban hang) or (va hanh)) di cau tre*.