Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
hoc dieu » hoc thieu, hoc hien
canh ban » can ban, canh dan, canh van
dan toan » van toan, dan than, manh toan
dan chan » dan gian, dan ca, van chat
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: hoc dieu hanh - canh ban cua nhung cong ((dan toan) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - canh ban cua nhung cong ((dan toan) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - canh ban cua nhung cong ((dan toan) or (dan chan)) cau*.