Perhaps you should try some spelling variations:
truong anh » trung anh, truong thanh, truong kinh
hieu lang » chieu sang, hieu quang, nhieu tang
anh hoang » thanh hoang, minh hoang, tnhh hoang
hoang van » hang va
trong anh » trong nganh, trong doanh, trong thanh
van dung » van dong, xay dung, tin dung
tuan tai » toan tai, quan tai, tan tai

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: ho ((hieu lang) OR (chinh sach)) - anh hoang van dung ((trong anh) OR (truong anh)) tuan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chinh sach)) - anh hoang van dung ((trong anh) OR (truong anh)) tuan tai~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chinh sach)) - anh hoang van dung ((trong anh) OR (truong anh)) tuan tai*.