Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hang doanh » hanh doanh, nhung doanh, van doanh
dieu tinh » diep tinh, lieu tinh, dien tinh
doanh cua » doanh luan
cua nhung » va nhung
hoc dieu » hoc thieu, hoc hien
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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

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