Perhaps you should try some spelling variations:
chiet tach » chieu sach
trong thai » trong thi, trong thuat, trong nha
trong thoi » trong thi, trong tho, trong trot
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - anh ((trong thai) or (trong thoi)) dung cong ((tac toan) or (tam toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - anh ((trong thai) OR (trong thoi)) dung cong ((tac toan) OR (tam toan)) ban.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - anh ((trong thai) or (trong thoi)) dung cong ((tac toan) or (tam toan)) ban*.