Perhaps you should try some spelling variations:
nhung cuong » hung cuong, nhung chong, nhung huong
hanh doanh » hang doanh, chinh doanh, doanh doanh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
doanh cua » doanh luan
hoc hieu » hoc hien, doc hieu, hoc dieu
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) OR (hoc thieu)) manh - hanh doanh cua ((nhung cuong) or (nhung cong)) tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) manh - hanh doanh cua ((nhung cuong) OR (nhung cong)) tap toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc thieu)) manh - hanh doanh cua ((nhung cuong) or (nhung cong)) tap toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc thieu)) manh - hanh doanh cua ((nhung cuong) or (nhung cong)) tap toan cau*.