Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat
tang ap » tang van, tang tai, tang dan
ap dung » xay dung, van dung
tinh » trinh, dinh, minh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((trieu tinh) OR (chieu sach)) - hanh tang ap dung cong ((dan than) OR (dan chan)) cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((trieu tinh) or (chieu sach)) - hanh tang ap dung cong ((dan than) OR (dan chan)) cap~".
• Adding a wildcard symbol may retrieve word variants: ho ((trieu tinh) or (chieu sach)) - hanh tang ap dung cong ((dan than) OR (dan chan)) cap*.