Perhaps you should try some spelling variations:
trong trinh » trong tinh, trang trinh, trong thinh
chieu sach » chinh sach, chieu sang, chieu xanh
hinh trong » chinh trong, dinh trong, sinh trong
quan duong » tuan duong, quan dong, qua duong
trinh toan » tinh toan, thanh toan, trinh han
quan dung » quang dung, qua dung, quan dong
toan cau » toan cao, toan ban, toan tap

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) OR (chiet tach)) - hinh trong ((quan dung) or (quan duong)) trong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - hinh trong ((quan dung) OR (quan duong)) trong trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - hinh trong ((quan dung) or (quan duong)) trong trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - hinh trong ((quan dung) or (quan duong)) trong trinh toan cau*.