Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chiet tach » chieu sach
tranh cua » doanh cua, manh cua
ho chiet » ho chieu, ho thiet, hoc thiet
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan
ban cua » ban quan

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 - canh ((tranh cua) or (ban cua)) nhung cong ((tan toan) OR (tap toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - canh ((tranh cua) OR (ban cua)) nhung cong ((tan toan) OR (tap toan)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - canh ((tranh cua) or (ban cua)) nhung cong ((tan toan) OR (tap toan)) ban*".