Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung dung
hanh truong » hanh trong, anh truong, manh truong
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, nhieu tang, hieu van
truong va » truong dai, truong cao, truong dao
dang hanh » dang thanh, ban hanh, dang van
hanh ca » hanh cac, hanh cat, hanh cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu quang)) - hanh truong va ((nhung huong) OR (nhung cong)) dang hanh ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (hieu quang)) - hanh truong va ((nhung huong) or (nhung cong)) dang hanh ca~".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (hieu quang)) - hanh truong va ((nhung huong) or (nhung cong)) dang hanh ca*.