Perhaps you should try some spelling variations:
thanh chuong » thanh huong, thanh cong, thanh hung
nhanh chong » thanh cong, khanh phong
nhung cong » thong cong, hang cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

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