Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
nganh toan » nganh thanh, thanh toan, manh toan
canh manh » lanh manh, canh tranh, cach mang
hang cong » dang cong, hang nong, bang cong
cac tinh » dac tinh, cuu tinh, ha tinh
manh cua » doanh cua, ban cua
toan ban » van ban

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

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