Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
ban hang » ngan hang
va hanh » van hanh, va thanh, va danh
di cau » da cau, diem cau
di cuu » di cua, dinh cuu
tu cam » tu cham, tu cac, tu nam
cam ky » cao ky, cac ky
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 van cham soc ((ban hang) or (va hanh)) ((di cuu) OR (di cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cam ky nang x hoi. hieu van cham soc ((ban hang) OR (va hanh)) ((di cuu) OR (di cau)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cam ky nang x hoi. hieu van cham soc ((ban hang) or (va hanh)) ((di cuu) OR (di cau)) tre*".