Perhaps you should try some spelling variations:
thieu quang » thien quan, trien quang, hieu quan
hieu quang » hieu quan, hieu qua, diep quang
chat nhung » chat ngung, thuat nhung, cua nhung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, nhieu tang, hieu van
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

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