Perhaps you should try some spelling variations:
ban hang » ngan hang
nang ro » nang co, nang ho, nang ra
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
ro hoc » co hoc, mo hoc, o hoc
di cuu » di cua, dinh cuu
di cau » da cau, diem cau

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

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