Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((((nhieu tang) or (chieu sach))) or (hieu lang)) - thanh tung va nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((nhieu tang) OR (chieu sach))) OR (hieu lang)) - thanh tung va nhung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((((nhieu tang) or (chieu sach))) or (hieu lang)) - thanh tung va nhung cong dan toan cao*.