Perhaps you should try some spelling variations:
doanh khoa » toan khoa
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
khoa cua » hoa cua, kho cua, khoe cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (hoc hien)) manh - doanh khoa cua nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (hoc hien)) manh - doanh khoa cua nhung cong dan toan tap*.