Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sach » chinh sach, chiet tach, chieu sang
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang
tang ap » tang van, tang tai, tang dan
ap dung » xay dung, van dung

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 ((chieu tinh) OR (chieu sach)) - hanh tang ap dung cong ((dan than) OR (ban than)) cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) or (chieu sach)) - hanh tang ap dung cong ((dan than) OR (ban than)) cap~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) or (chieu sach)) - hanh tang ap dung cong ((dan than) OR (ban than)) cap*.