Perhaps you should try some spelling variations:
thieu khang » thieu quang
chieu khong » chien chong, chu khong, chieu duong
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
tranh va » tranh van, trang va, trinh va
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: hoc ((((thieu khang) OR (chieu khong))) or (chieu xanh)) - canh tranh va nhung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu khang) OR (chieu khong))) OR (chieu xanh)) - canh tranh va nhung cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((thieu khang) OR (chieu khong))) or (chieu xanh)) - canh tranh va nhung cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu khang) OR (chieu khong))) or (chieu xanh)) - canh tranh va nhung cong tac toan tap*.