Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, ban danh
ban hanh » ban hang
tang van » dang van, hoang van, trong van
cau cua » ca cua, cu cua, chat cua
ky tang » ky nang, ky dang, kho tang
van hoe » van hoa, van hoc, van hieu
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
cua te » cua tu

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 ky tang van hoe. hieu ve ((cau cua) or (cau qua)) ((ban hanh) or (ban doanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky tang van hoe. hieu ve ((cau cua) OR (cau qua)) ((ban hanh) OR (ban doanh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu can ky tang van hoe. hieu ve ((cau cua) or (cau qua)) ((ban hanh) or (ban doanh)) vi cua te*.