Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
duong manh » duong van
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tang cua, trung cua, thang cua
tranh cua » doanh cua, manh cua
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban
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 - hanh ((trang cua) OR (tranh cua)) nhung duong manh ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trang cua) OR (tranh cua)) nhung duong manh ((toan tai) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((trang cua) OR (tranh cua)) nhung duong manh ((toan tai) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trang cua) OR (tranh cua)) nhung duong manh ((toan tai) or (toan tap))*.