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
hieu lang » chieu sang, hieu quang, nhieu tang
truong va » truong dai, truong cao, truong dao
van thanh » ban thanh, van tuan
dan toan » van toan, dan than, 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 (hieu lang)) - hanh truong va nhung phuong ((dan toan) OR (van thanh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (hieu lang)) - hanh truong va nhung phuong ((dan toan) OR (van thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (hieu lang)) - hanh truong va nhung phuong ((dan toan) OR (van thanh)) cau*.