Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » diep tinh, bien tinh
trang cua » tranh cua, tang cua, trung cua
tang luan » dung luan
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: ho ((trieu tinh) or (lieu tinh)) - hanh ((trang cua) or (tang luan)) nhung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((trieu tinh) OR (lieu tinh)) - hanh ((trang cua) OR (tang luan)) nhung cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ho ((trieu tinh) or (lieu tinh)) - hanh ((trang cua) or (tang luan)) nhung cong tac toan tap*.