Perhaps you should try some spelling variations:
nhung thong » chung thong, nhung phong, nhung tuong
nhung chong » nhung cong, nhung phong, nhung phuong
hieu quang » thieu quang, hieu quan, diep quang
manh trung » manh tung, thanh trung, manh hung
trung cap » truong cao, trung tam
van toan » van tuan, van tan, van thanh
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 ((hieu quang) OR (hieu qua)) - manh trung cap ((nhung thong) or (nhung chong)) van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (hieu qua)) - manh trung cap ((nhung thong) OR (nhung chong)) van toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) OR (hieu qua)) - manh trung cap ((nhung thong) or (nhung chong)) van toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) OR (hieu qua)) - manh trung cap ((nhung thong) or (nhung chong)) van toan tap*.