Perhaps you should try some spelling variations:
chiet tach » chieu sach
thien hach » thien thanh, hien hanh
quang dong » quang dung, quan dong, quang cuong
dong huong » dong thuong, dong duong, cong huong
hanh tran » hanh trang, thanh tran, hanh tram
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (thien hach)) - hanh tran quang dong huong ((dan than) OR (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (thien hach)) - hanh tran quang dong huong ((dan than) OR (dan chan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chiet tach) or (thien hach)) - hanh tran quang dong huong ((dan than) OR (dan chan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (thien hach)) - hanh tran quang dong huong ((dan than) OR (dan chan)) cao*.