Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
hieu lang » chieu sang, hieu quang, nhieu tang
cu truong » cua truong, cau truong, vu truong
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan
ho hieu » ho chieu, hoi hieu, nho hieu
cong cu » chung cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh cong cu truong cong ((tac toan) OR (tap toan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh cong cu truong cong ((tac toan) OR (tap toan)) ban".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh cong cu truong cong ((tac toan) OR (tap toan)) ban*.