Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh than » hanh han, hanh nhan, hanh phan
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, doi chieu
than cua » nhan cua, thai cua, ban cua
tan toan » tan tran, tap toan, van toan
tap doan » tap 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 chieu xanh - hanh than cua nhung cong ((tan toan) or (tap doan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh than cua nhung cong ((tan toan) OR (tap doan)) cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh than cua nhung cong ((tan toan) or (tap doan)) cao*.