Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong trinh » chuong trinh, cong trinh, huong tran
trinh toan » tinh toan, thanh toan, trinh han
thong cua » thong quan, thong tu, huong cua
tang luan » dung luan
toan dang » tran dang, toan mang, toan tang
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - anh ((thong cua) or (tang luan)) nhung phuong trinh toan dang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - anh ((thong cua) OR (tang luan)) nhung phuong trinh toan dang.
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - anh ((thong cua) or (tang luan)) nhung phuong trinh toan dang*.