Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doanh cua » doanh luan
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
hoc hai » hoc dai, hoc bai, hoc tai
hoc ha » hoc hoa, hoc hat, hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc ha) or (hoc hai)) tinh - hanh ((doanh cua) or (tang cua)) nhung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc ha) OR (hoc hai)) tinh - hanh ((doanh cua) OR (tang cua)) nhung cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc ha) or (hoc hai)) tinh - hanh ((doanh cua) or (tang cua)) nhung cong dan toan ban*.