Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu lang » chieu sang, hieu quang, nhieu tang
tran nang » tran dang, tran quang, tran hoang
dung cong » dung trong
tra nang » thi nang, kha nang, da nang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu tinh) or (hieu lang)) - hanh ((tran nang) or (tra nang)) dung cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu tinh) OR (hieu lang)) - hanh ((tran nang) OR (tra nang)) dung cong san toan tap.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) or (hieu lang)) - hanh ((tran nang) or (tra nang)) dung cong san toan tap*.