Perhaps you should try some spelling variations:
lieu quang » hieu quang, thieu quang, le quang
trung tuan » trung thanh, tran tuan, truong thanh
nhung cong » dung cong, thong cong, hang cong
lieu quan » lien quan, hieu qua, lieu van
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((lieu quang) or (lieu quan)) - hanh ((trung tuan) OR (trung tam)) nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((lieu quang) OR (lieu quan)) - hanh ((trung tuan) OR (trung tam)) nhung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((lieu quang) or (lieu quan)) - hanh ((trung tuan) OR (trung tam)) nhung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((lieu quang) or (lieu quan)) - hanh ((trung tuan) OR (trung tam)) nhung cong san toan cao*.