Perhaps you should try some spelling variations:
dang thuong » hang thuong, dung thuong, dong thuong
dang nguong » dung nguon, tang nguon, dang cuong
hieu quang » thieu quang, hieu quan, hieu qua
hieu lang » chieu sang, nhieu tang, hieu van
hanh mang » nhanh mang, hanh trang, nhanh lang
mang cua » manh cua, dung cua, ban cua
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) OR (hieu quang)) - hanh mang cua ((dang nguong) or (dang thuong)) dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu quang)) - hanh mang cua ((dang nguong) OR (dang thuong)) dan than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (hieu quang)) - hanh mang cua ((dang nguong) or (dang thuong)) dan than man".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (hieu quang)) - hanh mang cua ((dang nguong) or (dang thuong)) dan than man*.