Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, ha tinh, cua tinh
truong va » truong dai, truong cao, truong dao
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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