Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, chau tinh, kieu tinh
thanh tung » thanh cong
lieu tinh » trieu tinh, diep tinh, bien tinh
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
tung va » trung va, tuong va, dung va
va dung » van dung, va duong, vat 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 (lieu tinh))) OR (hieu lang)) - thanh tung va dung cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((chieu tinh) OR (lieu tinh))) or (hieu lang)) - thanh tung va dung cong tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu tinh) OR (lieu tinh))) or (hieu lang)) - thanh tung va dung cong tan toan cao*.