Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
nhieu tang » chieu sang, hieu lang, nhiet nang
hieu quang » thieu quang, hieu quan, hieu qua
cong thanh » dong thanh, cong tan, truong thanh
truong va » truong dai, truong cao, truong dao
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((nhieu tang) or (hieu quang)) - hanh truong va nhung ((cong thanh) OR (cong trinh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhieu tang) OR (hieu quang)) - hanh truong va nhung ((cong thanh) OR (cong trinh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((nhieu tang) or (hieu quang)) - hanh truong va nhung ((cong thanh) OR (cong trinh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) or (hieu quang)) - hanh truong va nhung ((cong thanh) OR (cong trinh)) toan cao*.