Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
chieu sang » chieu sach, chieu xanh, hieu lang
bang cong » dang cong, bang song, hang cong
manh toan » thanh toan, tinh toan
trung ha » trung hoc, trung tam, trung cap
ha bang » hai bang, ha tang, va bang

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 (chieu sang)) - thanh trung ha bang cong ((manh toan) or (anh tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (chieu sang)) - thanh trung ha bang cong ((manh toan) OR (anh tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (chieu sang)) - thanh trung ha bang cong ((manh toan) or (anh tuan)) cau*.