Perhaps you should try some spelling variations:
thiet nhan » thien nhan, triet nhan, trien nhan
sinh doanh » kinh doanh, sinh danh, minh doanh
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hang khoa » dung khoa
ban hang » ngan hang
luan dac » luan danh, luan van, luan san
luan va » luan van, luat va
thien » thieu, tien, hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ban hang khoa ((luan dac) or (luan va)) luan thiet nhan sinh doanh hoan thien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ban hang khoa ((luan dac) OR (luan va)) luan thiet nhan sinh doanh hoan thien.
• Adding a wildcard symbol may retrieve word variants: ban hang khoa ((luan dac) or (luan va)) luan thiet nhan sinh doanh hoan thien*.