Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, nhieu tang
chiet tach » chieu sach
hieu lang » hieu quang, nhieu tang, hieu van
tuong cua » truong cua, huong cua, thong cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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 sang) OR (hieu lang))) OR (chiet tach)) - thanh tuong cua dung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((chieu sang) OR (hieu lang))) or (chiet tach)) - thanh tuong cua dung cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu sang) OR (hieu lang))) or (chiet tach)) - thanh tuong cua dung cong tan toan cau*.