Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
hanh han » hanh nhan, hanh phan, hanh san
van toan » van tuan, van tan, van thanh
dan than » dan chan, ban than, van than
han va » hang va, hanh va, nhan va

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 sach - hanh han va ((nhung cong) or (nhung phuong)) ((van toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh han va ((nhung cong) OR (nhung phuong)) ((van toan) OR (dan than)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh han va ((nhung cong) or (nhung phuong)) ((van toan) or (dan than)) cau*.