Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thong cua » thong quan, thong tu, huong cua
tang luan » dung luan
cau sach » cao sach, rau sach, khau sach
hau sach » khau sach, ham sach, rau sach
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((cau sach) OR (hau sach)) - hanh ((thong cua) or (tang luan)) nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((cau sach) OR (hau sach)) - hanh ((thong cua) OR (tang luan)) nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((cau sach) OR (hau sach)) - hanh ((thong cua) or (tang luan)) nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((cau sach) OR (hau sach)) - hanh ((thong cua) or (tang luan)) nhung cong tac toan cau*.