Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
hanh truong » hanh trong, anh truong, manh truong
chieu sach » chinh sach, chiet tach, chieu sang
truong cua » truong ca, truong quan, truong cao
cua nhung » va nhung
van thanh » ban thanh, van tuan
van toan » van tuan, van tan, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (cuu tinh)) - hanh truong cua nhung phuong ((van toan) OR (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (cuu tinh)) - hanh truong cua nhung phuong ((van toan) OR (van thanh)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (cuu tinh)) - hanh truong cua nhung phuong ((van toan) OR (van thanh)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (cuu tinh)) - hanh truong cua nhung phuong ((van toan) OR (van thanh)) cao*.