Perhaps you should try some spelling variations:
cong quang » luong quang, thong quang, duong quang
quang lang » quan lang, quang dang, quang hoang
lang tuong » lang trong, bang tuong, lang muong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tuong dan » huong dan, tung dan, xuong dan
kim ngan » kim ngoc
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) or (kim ngan)) - thanh cong quang lang tuong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (kim ngan)) - thanh cong quang lang tuong dan than cap.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (kim ngan)) - thanh cong quang lang tuong dan than cap*.