Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
nhung cong » dung cong, thong cong, hang cong
hanh dong » anh dong, ha dong
hoc nhung » hoa nhung, hon nhung, nuoc nhung
theo chu » cho chu, chao chu, theo yeu
dong hoc » dong co, dong luc
tan toan » tap toan, van toan, dan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (theo chu)) xanh - hanh dong hoc nhung cong ((tan toan) or (tan tran)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) xanh - hanh dong hoc nhung cong ((tan toan) OR (tan tran)) cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) xanh - hanh dong hoc nhung cong ((tan toan) or (tan tran)) cau*.