Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
hieu lang » chieu sang, nhieu tang, hieu van
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
tap quan » tac quan, hai quan
quan cao » quang cao, quan cau, quan ao
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 (((hieu lang) OR (hieu quang)))) - thanh tung va dung cong tap quan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) or (((hieu lang) OR (hieu quang)))) - thanh tung va dung cong tap quan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) or (((hieu lang) OR (hieu quang)))) - thanh tung va dung cong tap quan cao*.